711981 divided by 91 
The aim is to understand the frequency of 91 in 711981.

Going ahead to step 1:
When dividing 7 by 91, we get 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Include the next digit (1) from the dividend after 7, then repeat: 71 / 91

Step 2:
91 goes into 71 0 times with a remainder of 71.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 71 and we're left with 71.
Grab the next digit (1) from the dividend, add it to 71, then carry on: 711 / 91

Going ahead to step 3:
When dividing 711 by 91, we get 7 with a remainder of 74.
Write down 7 as next digit of the result. 
Result so far: 7.0
Subtracting 637 from 711 leaves us with 74.
Take the next digit (9) from the dividend and append it to 74, then repeat: 749 / 91

On to step 4:
91 can be fit into 749 8 times, resulting in a remainder of 21.
Record the quotient 8 as the next digit in the result. 
Result so far: 78.0
If we take 728 away from 749, we end up with 21.
Append the next digit (8) from the dividend to 21 and continue with: 218 / 91

Moving on to step 5:
When dividing 218 by 91, we get 2 with a remainder of 36.
Put 2 as the next digit of the answer. 
Result so far: 782.0
If we take 182 away from 218, we end up with 36.
Bring next digit (1) of the dividend behind the 36 and repeat the process: 361 / 91

Going ahead to step 6:
91 can be fit into 361 3 times, resulting in a remainder of 88.
Record the quotient 3 as the next digit in the result. 
Result so far: 7823.0
If we take 273 away from 361, we end up with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Advancing to step 7:
880 divided by 91 is 9 with a remainder of 61.
Record the quotient 9 as the next digit in the result. 
Result so far: 7823.9
If we subtract 819 from 880, we get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Moving on to step 8:
If we divide 610 by 91, we get 6 and a remainder of 64.
The number 6 becomes the next digit in our result. 
Result so far: 7823.96
If we subtract 546 from 610, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 9:
91 goes into 640 7 times with a remainder of 3.
The next digit of our result is 7. 
Result so far: 7823.967
The remainder is 3 after subtracting 637 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 10:
30 divided by 91 is 0 with a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 7823.967
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 11:
The number 91 fits into 300 3 times, leaving a remainder of 27.
The number 3 becomes the next digit in our result. 
Result so far: 7823.96703
Deduct 273 from 300 and we're left with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Going ahead to step 12:
91 goes into 270 2 times with a remainder of 88.
The next digit of our result is 2. 
Result so far: 7823.967032
Subtracting 182 from 270 leaves us with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Going ahead to step 13:
880 divided by 91 is 9 with a remainder of 61.
The number 9 becomes the next digit in our result. 
Result so far: 7823.9670329
If we subtract 819 from 880, we get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Let's proceed to step 14:
91 can be fit into 610 6 times, resulting in a remainder of 64.
The next digit of our result is 6. 
Result so far: 7823.96703296
If we take 546 away from 610, we end up with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

The quotient of the division is 7823.96703296, and the remainder is 6.4e-08.