We're dividing 126165 by 91 
The aim is to understand the frequency of 91 in 126165.

Moving on to step 1:
91 goes into 1 0 times with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 91

Let's proceed to step 2:
The number 91 fits into 12 0 times, leaving a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 12, we end up with 12.
Take the next digit (6) from the dividend and append it to 12, then repeat: 126 / 91

Going ahead to step 3:
The number 91 fits into 126 1 times, leaving a remainder of 35.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 35 after subtracting 91 from 126.
Grab the next digit (1) from the dividend, add it to 35, then carry on: 351 / 91

Moving on to step 4:
91 can be fit into 351 3 times, resulting in a remainder of 78.
The next digit of our result is 3. 
Result so far: 13.0
Subtract 273 from 351 to get 78.
Bring next digit (6) of the dividend behind the 78 and repeat the process: 786 / 91

Going ahead to step 5:
91 goes into 786 8 times with a remainder of 58.
The next digit of our result is 8. 
Result so far: 138.0
If we subtract 728 from 786, we get 58.
Take the next digit (5) from the dividend and append it to 58, then repeat: 585 / 91

Moving on to step 6:
When dividing 585 by 91, we get 6 with a remainder of 39.
The next digit of our result is 6. 
Result so far: 1386.0
Subtracting 546 from 585 leaves us 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.

Advancing to step 7:
When dividing 390 by 91, we get 4 with a remainder of 26.
Put 4 as the next digit of the answer. 
Result so far: 1386.4
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.

Advancing to step 8:
When dividing 260 by 91, we get 2 with a remainder of 78.
Record the quotient 2 as the next digit in the result. 
Result so far: 1386.42
Deduct 182 from 260 and we're left with 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 9:
If we divide 780 by 91, we get 8 and a remainder of 52.
Use 8 as the next digit of our solution. 
Result so far: 1386.428
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.

Let's proceed to step 10:
When dividing 520 by 91, we get 5 with a remainder of 65.
The number 5 becomes the next digit in our result. 
Result so far: 1386.4285
Subtract 455 from 520 to get 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 11:
91 can be fit into 650 7 times, resulting in a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 1386.42857
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.

Advancing to step 12:
When dividing 130 by 91, we get 1 with a remainder of 39.
Put 1 as the next digit of the answer. 
Result so far: 1386.428571
Subtract 91 from 130 to get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Let's proceed to step 13:
The number 91 fits into 390 4 times, leaving a remainder of 26.
Record the quotient 4 as the next digit in the result. 
Result so far: 1386.4285714
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.

Let's proceed to step 14:
91 goes into 260 2 times with a remainder of 78.
Write down 2 as next digit of the result. 
Result so far: 1386.42857142
If we subtract 182 from 260, we 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.

The quotient of the division is 1386.42857142, and the remainder is 7.8e-08.