We're dividing 515745 by 91 
The aim is to understand the frequency of 91 in 515745.

Let's proceed to step 1:
When dividing 5 by 91, we get 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 91

On to step 2:
The number 91 fits into 51 0 times, leaving a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Include the next digit (5) from the dividend after 51, then repeat: 515 / 91

On to step 3:
If we divide 515 by 91, we get 5 and a remainder of 60.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
Subtracting 455 from 515 leaves us with 60.
Grab the next digit (7) from the dividend, add it to 60, then carry on: 607 / 91

On to step 4:
607 divided by 91 is 6 with a remainder of 61.
The number 6 becomes the next digit in our result. 
Result so far: 56.0
Subtract 546 from 607 to get 61.
Append the next digit (4) from the dividend to 61 and continue with: 614 / 91

Moving on to step 5:
91 can be fit into 614 6 times, resulting in a remainder of 68.
Record the quotient 6 as the next digit in the result. 
Result so far: 566.0
The remainder is 68 after subtracting 546 from 614.
Take the next digit (5) from the dividend and append it to 68, then repeat: 685 / 91

Moving on to step 6:
91 goes into 685 7 times with a remainder of 48.
Write down 7 as next digit of the result. 
Result so far: 5667.0
Deduct 637 from 685 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.

Advancing to step 7:
91 goes into 480 5 times with a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 5667.5
If we subtract 455 from 480, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 8:
When dividing 250 by 91, we get 2 with a remainder of 68.
Put 2 as the next digit of the answer. 
Result so far: 5667.52
Subtracting 182 from 250 leaves us 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.

Moving on to step 9:
When dividing 680 by 91, we get 7 with a remainder of 43.
Write down 7 as next digit of the result. 
Result so far: 5667.527
If we subtract 637 from 680, we 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.

Advancing to step 10:
The number 91 fits into 430 4 times, leaving a remainder of 66.
Write down 4 as next digit of the result. 
Result so far: 5667.5274
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.

Moving on to step 11:
91 can be fit into 660 7 times, resulting in a remainder of 23.
Put 7 as the next digit of the answer. 
Result so far: 5667.52747
Subtracting 637 from 660 leaves us 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.

On to step 12:
The number 91 fits into 230 2 times, leaving a remainder of 48.
The next digit of our result is 2. 
Result so far: 5667.527472
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.

Let's proceed to step 13:
The number 91 fits into 480 5 times, leaving a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 5667.5274725
If we take 455 away from 480, we end up 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.

Going ahead to step 14:
91 can be fit into 250 2 times, resulting in a remainder of 68.
The number 2 becomes the next digit in our result. 
Result so far: 5667.52747252
The remainder is 68 after subtracting 182 from 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

In conclusion, the division gives 5667.52747252 with a balance of 6.8e-08.