We're dividing 35081787 by 991 
The aim is to understand the frequency of 991 in 35081787.

Step 1:
991 can be fit into 3 0 times, resulting in a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Bring next digit (5) of the dividend behind the 3 and repeat the process: 35 / 991

On to step 2:
When dividing 35 by 991, we get 0 with a remainder of 35.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 35, we get 35.
Bring next digit (0) of the dividend behind the 35 and repeat the process: 350 / 991

Step 3:
The number 991 fits into 350 0 times, leaving a remainder of 350.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 350, we get 350.
Bring next digit (8) of the dividend behind the 350 and repeat the process: 3508 / 991

On to step 4:
If we divide 3508 by 991, we get 3 and a remainder of 535.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Deduct 2973 from 3508 and we're left with 535.
Bring next digit (1) of the dividend behind the 535 and repeat the process: 5351 / 991

On to step 5:
The number 991 fits into 5351 5 times, leaving a remainder of 396.
Record the quotient 5 as the next digit in the result. 
Result so far: 35.0
Subtracting 4955 from 5351 leaves us with 396.
Append the next digit (7) from the dividend to 396 and continue with: 3967 / 991

Let's proceed to step 6:
991 goes into 3967 4 times with a remainder of 3.
Write down 4 as next digit of the result. 
Result so far: 354.0
The remainder is 3 after subtracting 3964 from 3967.
Bring next digit (8) of the dividend behind the 3 and repeat the process: 38 / 991

Going ahead to step 7:
The number 991 fits into 38 0 times, leaving a remainder of 38.
Record the quotient 0 as the next digit in the result. 
Result so far: 3540.0
Subtract 0 from 38 to get 38.
Include the next digit (7) from the dividend after 38, then repeat: 387 / 991

Moving on to step 8:
The number 991 fits into 387 0 times, leaving a remainder of 387.
The number 0 becomes the next digit in our result. 
Result so far: 35400.0
Subtract 0 from 387 to get 387.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3870, and continue the process.

Step 9:
If we divide 3870 by 991, we get 3 and a remainder of 897.
The number 3 becomes the next digit in our result. 
Result so far: 35400.3
Deduct 2973 from 3870 and we're left with 897.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8970, and continue the process.

Step 10:
If we divide 8970 by 991, we get 9 and a remainder of 51.
Write down 9 as next digit of the result. 
Result so far: 35400.39
Subtracting 8919 from 8970 leaves us with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Going ahead to step 11:
991 goes into 510 0 times with a remainder of 510.
The next digit of our result is 0. 
Result so far: 35400.39
If we subtract 0 from 510, we get 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

Step 12:
When dividing 5100 by 991, we get 5 with a remainder of 145.
Write down 5 as next digit of the result. 
Result so far: 35400.3905
If we take 4955 away from 5100, we end up with 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Going ahead to step 13:
If we divide 1450 by 991, we get 1 and a remainder of 459.
Write down 1 as next digit of the result. 
Result so far: 35400.39051
Subtracting 991 from 1450 leaves us with 459.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4590, and continue the process.

Let's proceed to step 14:
If we divide 4590 by 991, we get 4 and a remainder of 626.
Put 4 as the next digit of the answer. 
Result so far: 35400.390514
Subtract 3964 from 4590 to get 626.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6260, and continue the process.

Let's proceed to step 15:
6260 divided by 991 is 6 with a remainder of 314.
Put 6 as the next digit of the answer. 
Result so far: 35400.3905146
Subtract 5946 from 6260 to get 314.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3140, and continue the process.

Let's proceed to step 16:
3140 divided by 991 is 3 with a remainder of 167.
The next digit of our result is 3. 
Result so far: 35400.39051463
If we take 2973 away from 3140, we end up with 167.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1670, and continue the process.

In conclusion, the division gives 35400.39051463 with a balance of 1.67e-07.