We look at the division of 52557845 by 91 
The aim is to understand the frequency of 91 in 52557845.

Moving on to step 1:
91 can be fit into 5 0 times, resulting in a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Take the next digit (2) from the dividend and append it to 5, then repeat: 52 / 91

Let's proceed to step 2:
If we divide 52 by 91, we get 0 and a remainder of 52.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 52 to get 52.
Grab the next digit (5) from the dividend, add it to 52, then carry on: 525 / 91

Moving on to step 3:
If we divide 525 by 91, we get 5 and a remainder of 70.
The next digit of our result is 5. 
Result so far: 5.0
Deduct 455 from 525 and we're left with 70.
Grab the next digit (5) from the dividend, add it to 70, then carry on: 705 / 91

Step 4:
705 divided by 91 is 7 with a remainder of 68.
Put 7 as the next digit of the answer. 
Result so far: 57.0
Subtracting 637 from 705 leaves us with 68.
Fetch the next digit (7) from the dividend, attach it to 68 and continue: 687 / 91

Step 5:
687 divided by 91 is 7 with a remainder of 50.
Put 7 as the next digit of the answer. 
Result so far: 577.0
Subtract 637 from 687 to get 50.
Include the next digit (8) from the dividend after 50, then repeat: 508 / 91

Going ahead to step 6:
If we divide 508 by 91, we get 5 and a remainder of 53.
The next digit of our result is 5. 
Result so far: 5775.0
Subtracting 455 from 508 leaves us with 53.
Take the next digit (4) from the dividend and append it to 53, then repeat: 534 / 91

Advancing to step 7:
91 can be fit into 534 5 times, resulting in a remainder of 79.
Write down 5 as next digit of the result. 
Result so far: 57755.0
Subtract 455 from 534 to get 79.
Fetch the next digit (5) from the dividend, attach it to 79 and continue: 795 / 91

Going ahead to step 8:
The number 91 fits into 795 8 times, leaving a remainder of 67.
Put 8 as the next digit of the answer. 
Result so far: 577558.0
Subtracting 728 from 795 leaves us with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Step 9:
When dividing 670 by 91, we get 7 with a remainder of 33.
Record the quotient 7 as the next digit in the result. 
Result so far: 577558.7
Subtract 637 from 670 to get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Let's proceed to step 10:
When dividing 330 by 91, we get 3 with a remainder of 57.
The number 3 becomes the next digit in our result. 
Result so far: 577558.73
The remainder is 57 after subtracting 273 from 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Step 11:
91 can be fit into 570 6 times, resulting in a remainder of 24.
Put 6 as the next digit of the answer. 
Result so far: 577558.736
Deduct 546 from 570 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 12:
91 can be fit into 240 2 times, resulting in a remainder of 58.
Write down 2 as next digit of the result. 
Result so far: 577558.7362
Subtracting 182 from 240 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 13:
The number 91 fits into 580 6 times, leaving a remainder of 34.
Write down 6 as next digit of the result. 
Result so far: 577558.73626
If we subtract 546 from 580, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Step 14:
The number 91 fits into 340 3 times, leaving a remainder of 67.
Put 3 as the next digit of the answer. 
Result so far: 577558.736263
Subtracting 273 from 340 leaves us with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

On to step 15:
91 can be fit into 670 7 times, resulting in a remainder of 33.
Record the quotient 7 as the next digit in the result. 
Result so far: 577558.7362637
If we take 637 away from 670, we end up with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Going ahead to step 16:
91 goes into 330 3 times with a remainder of 57.
Write down 3 as next digit of the result. 
Result so far: 577558.73626373
The remainder is 57 after subtracting 273 from 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

The quotient of the division is 577558.73626373, and the remainder is 5.7e-08.