We're dividing 171526 by 91 
The aim is to understand the frequency of 91 in 171526.

Advancing to step 1:
The number 91 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Fetch the next digit (7) from the dividend, attach it to 1 and continue: 17 / 91

On to step 2:
17 divided by 91 is 0 with a remainder of 17.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 17 to get 17.
Grab the next digit (1) from the dividend, add it to 17, then carry on: 171 / 91

Advancing to step 3:
The number 91 fits into 171 1 times, leaving a remainder of 80.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 91 from 171 leaves us with 80.
Bring next digit (5) of the dividend behind the 80 and repeat the process: 805 / 91

Step 4:
If we divide 805 by 91, we get 8 and a remainder of 77.
Put 8 as the next digit of the answer. 
Result so far: 18.0
If we subtract 728 from 805, we get 77.
Grab the next digit (2) from the dividend, add it to 77, then carry on: 772 / 91

On to step 5:
91 can be fit into 772 8 times, resulting in a remainder of 44.
Write down 8 as next digit of the result. 
Result so far: 188.0
Deduct 728 from 772 and we're left with 44.
Fetch the next digit (6) from the dividend, attach it to 44 and continue: 446 / 91

Going ahead to step 6:
The number 91 fits into 446 4 times, leaving a remainder of 82.
Put 4 as the next digit of the answer. 
Result so far: 1884.0
If we subtract 364 from 446, we get 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Let's proceed to step 7:
91 goes into 820 9 times with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 1884.9
The remainder is 1 after subtracting 819 from 820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 8:
10 divided by 91 is 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 1884.9
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 9:
When dividing 100 by 91, we get 1 with a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 1884.901
If we take 91 away from 100, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 10:
91 can be fit into 90 0 times, resulting in a remainder of 90.
Use 0 as the next digit of our solution. 
Result so far: 1884.901
Subtracting 0 from 90 leaves us with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Step 11:
91 can be fit into 900 9 times, resulting in a remainder of 81.
Record the quotient 9 as the next digit in the result. 
Result so far: 1884.90109
Deduct 819 from 900 and we're left with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Advancing to step 12:
The number 91 fits into 810 8 times, leaving a remainder of 82.
Use 8 as the next digit of our solution. 
Result so far: 1884.901098
Deduct 728 from 810 and we're left with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Advancing to step 13:
91 goes into 820 9 times with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 1884.9010989
Subtracting 819 from 820 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 14:
When dividing 10 by 91, we get 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 1884.9010989
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The quotient of the division is 1884.9010989, and the remainder is 1e-08.