We look at the division of 11699711 by 991 
The aim is to understand the frequency of 991 in 11699711.

On to step 1:
991 can be fit into 1 0 times, resulting in a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (1) of the dividend behind the 1 and repeat the process: 11 / 991

Advancing to step 2:
The number 991 fits into 11 0 times, leaving a remainder of 11.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 11, we end up with 11.
Take the next digit (6) from the dividend and append it to 11, then repeat: 116 / 991

Let's proceed to step 3:
991 goes into 116 0 times with a remainder of 116.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 116 to get 116.
Fetch the next digit (9) from the dividend, attach it to 116 and continue: 1169 / 991

Step 4:
991 can be fit into 1169 1 times, resulting in a remainder of 178.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 178 after subtracting 991 from 1169.
Include the next digit (9) from the dividend after 178, then repeat: 1789 / 991

Advancing to step 5:
When dividing 1789 by 991, we get 1 with a remainder of 798.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
The remainder is 798 after subtracting 991 from 1789.
Grab the next digit (7) from the dividend, add it to 798, then carry on: 7987 / 991

Advancing to step 6:
When dividing 7987 by 991, we get 8 with a remainder of 59.
Record the quotient 8 as the next digit in the result. 
Result so far: 118.0
If we take 7928 away from 7987, we end up with 59.
Bring next digit (1) of the dividend behind the 59 and repeat the process: 591 / 991

Let's proceed to step 7:
If we divide 591 by 991, we get 0 and a remainder of 591.
The next digit of our result is 0. 
Result so far: 1180.0
The remainder is 591 after subtracting 0 from 591.
Take the next digit (1) from the dividend and append it to 591, then repeat: 5911 / 991

Going ahead to step 8:
991 goes into 5911 5 times with a remainder of 956.
Put 5 as the next digit of the answer. 
Result so far: 11805.0
If we take 4955 away from 5911, we end up with 956.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9560, and continue the process.

On to step 9:
9560 divided by 991 is 9 with a remainder of 641.
Write down 9 as next digit of the result. 
Result so far: 11805.9
Deduct 8919 from 9560 and we're left with 641.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6410, and continue the process.

Step 10:
When dividing 6410 by 991, we get 6 with a remainder of 464.
The number 6 becomes the next digit in our result. 
Result so far: 11805.96
If we take 5946 away from 6410, we end up with 464.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4640, and continue the process.

Going ahead to step 11:
When dividing 4640 by 991, we get 4 with a remainder of 676.
The next digit of our result is 4. 
Result so far: 11805.964
If we subtract 3964 from 4640, we get 676.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6760, and continue the process.

Let's proceed to step 12:
991 goes into 6760 6 times with a remainder of 814.
The number 6 becomes the next digit in our result. 
Result so far: 11805.9646
If we take 5946 away from 6760, we end up with 814.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8140, and continue the process.

Advancing to step 13:
If we divide 8140 by 991, we get 8 and a remainder of 212.
Record the quotient 8 as the next digit in the result. 
Result so far: 11805.96468
Deduct 7928 from 8140 and we're left with 212.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2120, and continue the process.

Moving on to step 14:
991 can be fit into 2120 2 times, resulting in a remainder of 138.
Write down 2 as next digit of the result. 
Result so far: 11805.964682
If we take 1982 away from 2120, we end up with 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

Moving on to step 15:
When dividing 1380 by 991, we get 1 with a remainder of 389.
Write down 1 as next digit of the result. 
Result so far: 11805.9646821
Deduct 991 from 1380 and we're left with 389.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3890, and continue the process.

Going ahead to step 16:
3890 divided by 991 is 3 with a remainder of 917.
The number 3 becomes the next digit in our result. 
Result so far: 11805.96468213
If we take 2973 away from 3890, we end up with 917.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9170, and continue the process.

The final outcome is 11805.96468213, with a leftover of 9.17e-07.