634520 ÷ 91 
The aim is to understand the frequency of 91 in 634520.

On to step 1:
91 can be fit into 6 0 times, resulting in a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (3) from the dividend, add it to 6, then carry on: 63 / 91

Moving on to step 2:
If we divide 63 by 91, we get 0 and a remainder of 63.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 63 leaves us with 63.
Bring next digit (4) of the dividend behind the 63 and repeat the process: 634 / 91

Step 3:
The number 91 fits into 634 6 times, leaving a remainder of 88.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
If we take 546 away from 634, we end up with 88.
Include the next digit (5) from the dividend after 88, then repeat: 885 / 91

Advancing to step 4:
91 goes into 885 9 times with a remainder of 66.
The number 9 becomes the next digit in our result. 
Result so far: 69.0
Subtract 819 from 885 to get 66.
Fetch the next digit (2) from the dividend, attach it to 66 and continue: 662 / 91

Going ahead to step 5:
If we divide 662 by 91, we get 7 and a remainder of 25.
Write down 7 as next digit of the result. 
Result so far: 697.0
The remainder is 25 after subtracting 637 from 662.
Include the next digit (0) from the dividend after 25, then repeat: 250 / 91

On to step 6:
91 can be fit into 250 2 times, resulting in a remainder of 68.
Put 2 as the next digit of the answer. 
Result so far: 6972.0
If we take 182 away from 250, we end up with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Let's proceed to step 7:
If we divide 680 by 91, we get 7 and a remainder of 43.
Record the quotient 7 as the next digit in the result. 
Result so far: 6972.7
Subtract 637 from 680 to get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Moving on to step 8:
If we divide 430 by 91, we get 4 and a remainder of 66.
The next digit of our result is 4. 
Result so far: 6972.74
If we subtract 364 from 430, we get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Let's proceed to step 9:
When dividing 660 by 91, we get 7 with a remainder of 23.
The next digit of our result is 7. 
Result so far: 6972.747
If we take 637 away from 660, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 10:
91 can be fit into 230 2 times, resulting in a remainder of 48.
Record the quotient 2 as the next digit in the result. 
Result so far: 6972.7472
Deduct 182 from 230 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 11:
480 divided by 91 is 5 with a remainder of 25.
The next digit of our result is 5. 
Result so far: 6972.74725
Subtracting 455 from 480 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 12:
When dividing 250 by 91, we get 2 with a remainder of 68.
Write down 2 as next digit of the result. 
Result so far: 6972.747252
Subtract 182 from 250 to get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Moving on to step 13:
91 can be fit into 680 7 times, resulting in a remainder of 43.
Write down 7 as next digit of the result. 
Result so far: 6972.7472527
If we take 637 away from 680, we end up with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Moving on to step 14:
91 goes into 430 4 times with a remainder of 66.
The next digit of our result is 4. 
Result so far: 6972.74725274
Subtracting 364 from 430 leaves us with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

The final result is 6972.74725274 with a remainder of 6.6e-08.