97255988 divided by 91 
The aim is to understand the frequency of 91 in 97255988.

Going ahead to step 1:
If we divide 9 by 91, we get 0 and a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Fetch the next digit (7) from the dividend, attach it to 9 and continue: 97 / 91

Moving on to step 2:
The number 91 fits into 97 1 times, leaving a remainder of 6.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 91 from 97, we get 6.
Include the next digit (2) from the dividend after 6, then repeat: 62 / 91

Let's proceed to step 3:
91 can be fit into 62 0 times, resulting in a remainder of 62.
The next digit of our result is 0. 
Result so far: 10.0
The remainder is 62 after subtracting 0 from 62.
Take the next digit (5) from the dividend and append it to 62, then repeat: 625 / 91

Step 4:
625 divided by 91 is 6 with a remainder of 79.
The number 6 becomes the next digit in our result. 
Result so far: 106.0
Subtracting 546 from 625 leaves us with 79.
Fetch the next digit (5) from the dividend, attach it to 79 and continue: 795 / 91

On to step 5:
91 goes into 795 8 times with a remainder of 67.
The next digit of our result is 8. 
Result so far: 1068.0
Deduct 728 from 795 and we're left with 67.
Fetch the next digit (9) from the dividend, attach it to 67 and continue: 679 / 91

Going ahead to step 6:
91 goes into 679 7 times with a remainder of 42.
The number 7 becomes the next digit in our result. 
Result so far: 10687.0
Deduct 637 from 679 and we're left with 42.
Grab the next digit (8) from the dividend, add it to 42, then carry on: 428 / 91

Step 7:
428 divided by 91 is 4 with a remainder of 64.
The next digit of our result is 4. 
Result so far: 106874.0
If we take 364 away from 428, we end up with 64.
Grab the next digit (8) from the dividend, add it to 64, then carry on: 648 / 91

On to step 8:
91 can be fit into 648 7 times, resulting in a remainder of 11.
The next digit of our result is 7. 
Result so far: 1068747.0
Subtracting 637 from 648 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 9:
91 can be fit into 110 1 times, resulting in a remainder of 19.
The next digit of our result is 1. 
Result so far: 1068747.1
Deduct 91 from 110 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 10:
When dividing 190 by 91, we get 2 with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 1068747.12
If we take 182 away from 190, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 11:
80 divided by 91 is 0 with a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 1068747.12
The remainder is 80 after subtracting 0 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 12:
The number 91 fits into 800 8 times, leaving a remainder of 72.
Record the quotient 8 as the next digit in the result. 
Result so far: 1068747.1208
If we take 728 away from 800, we end up with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Advancing to step 13:
When dividing 720 by 91, we get 7 with a remainder of 83.
Put 7 as the next digit of the answer. 
Result so far: 1068747.12087
The remainder is 83 after subtracting 637 from 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

On to step 14:
The number 91 fits into 830 9 times, leaving a remainder of 11.
The next digit of our result is 9. 
Result so far: 1068747.120879
The remainder is 11 after subtracting 819 from 830.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 15:
When dividing 110 by 91, we get 1 with a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 1068747.1208791
If we subtract 91 from 110, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 16:
190 divided by 91 is 2 with a remainder of 8.
The next digit of our result is 2. 
Result so far: 1068747.12087912
Subtracting 182 from 190 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final result is 1068747.12087912 with a remainder of 8e-09.