We're dividing 526760 by 91 
The aim is to understand the frequency of 91 in 526760.

Step 1:
5 divided by 91 is 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Include the next digit (2) from the dividend after 5, then repeat: 52 / 91

Advancing to step 2:
52 divided by 91 is 0 with a remainder of 52.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 52 after subtracting 0 from 52.
Fetch the next digit (6) from the dividend, attach it to 52 and continue: 526 / 91

Step 3:
The number 91 fits into 526 5 times, leaving a remainder of 71.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
Deduct 455 from 526 and we're left with 71.
Grab the next digit (7) from the dividend, add it to 71, then carry on: 717 / 91

Step 4:
If we divide 717 by 91, we get 7 and a remainder of 80.
Use 7 as the next digit of our solution. 
Result so far: 57.0
Subtracting 637 from 717 leaves us with 80.
Take the next digit (6) from the dividend and append it to 80, then repeat: 806 / 91

Going ahead to step 5:
91 can be fit into 806 8 times, resulting in a remainder of 78.
Record the quotient 8 as the next digit in the result. 
Result so far: 578.0
Deduct 728 from 806 and we're left with 78.
Take the next digit (0) from the dividend and append it to 78, then repeat: 780 / 91

Moving on to step 6:
780 divided by 91 is 8 with a remainder of 52.
Put 8 as the next digit of the answer. 
Result so far: 5788.0
If we take 728 away from 780, we end up with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 7:
91 can be fit into 520 5 times, resulting in a remainder of 65.
Record the quotient 5 as the next digit in the result. 
Result so far: 5788.5
The remainder is 65 after subtracting 455 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Let's proceed to step 8:
When dividing 650 by 91, we get 7 with a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 5788.57
The remainder is 13 after subtracting 637 from 650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 9:
130 divided by 91 is 1 with a remainder of 39.
The next digit of our result is 1. 
Result so far: 5788.571
Deduct 91 from 130 and we're left with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Going ahead to step 10:
91 can be fit into 390 4 times, resulting in a remainder of 26.
Use 4 as the next digit of our solution. 
Result so far: 5788.5714
Subtracting 364 from 390 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 11:
91 can be fit into 260 2 times, resulting in a remainder of 78.
The next digit of our result is 2. 
Result so far: 5788.57142
Subtract 182 from 260 to get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

On to step 12:
The number 91 fits into 780 8 times, leaving a remainder of 52.
The number 8 becomes the next digit in our result. 
Result so far: 5788.571428
If we subtract 728 from 780, we get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 13:
If we divide 520 by 91, we get 5 and a remainder of 65.
Put 5 as the next digit of the answer. 
Result so far: 5788.5714285
Deduct 455 from 520 and we're left with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

On to step 14:
91 goes into 650 7 times with a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 5788.57142857
Subtract 637 from 650 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

The quotient of the division is 5788.57142857, and the remainder is 1.3e-08.