We divide 115880 by 91
The aim is to understand the frequency of 91 in 115880.

Moving on 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
Subtracting 0 from 1 leaves us with 1.
Append the next digit (1) from the dividend to 1 and continue with: 11 / 91

On to step 2:
When dividing 11 by 91, we get 0 with a remainder of 11.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 11, we get 11.
Grab the next digit (5) from the dividend, add it to 11, then carry on: 115 / 91

Moving on to step 3:
When dividing 115 by 91, we get 1 with a remainder of 24.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 24 after subtracting 91 from 115.
Take the next digit (8) from the dividend and append it to 24, then repeat: 248 / 91

Advancing to step 4:
91 can be fit into 248 2 times, resulting in a remainder of 66.
Use 2 as the next digit of our solution. 
Result so far: 12.0
The remainder is 66 after subtracting 182 from 248.
Grab the next digit (8) from the dividend, add it to 66, then carry on: 668 / 91

Going ahead to step 5:
When dividing 668 by 91, we get 7 with a remainder of 31.
The number 7 becomes the next digit in our result. 
Result so far: 127.0
Subtract 637 from 668 to get 31.
Include the next digit (0) from the dividend after 31, then repeat: 310 / 91

On to step 6:
The number 91 fits into 310 3 times, leaving a remainder of 37.
Use 3 as the next digit of our solution. 
Result so far: 1273.0
The remainder is 37 after subtracting 273 from 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Moving on to step 7:
When dividing 370 by 91, we get 4 with a remainder of 6.
Put 4 as the next digit of the answer. 
Result so far: 1273.4
Deduct 364 from 370 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 8:
91 goes into 60 0 times with a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 1273.4
If we take 0 away from 60, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 9:
If we divide 600 by 91, we get 6 and a remainder of 54.
Write down 6 as next digit of the result. 
Result so far: 1273.406
If we take 546 away from 600, we end up with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Let's proceed to step 10:
When dividing 540 by 91, we get 5 with a remainder of 85.
The next digit of our result is 5. 
Result so far: 1273.4065
Subtract 455 from 540 to get 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Moving on to step 11:
If we divide 850 by 91, we get 9 and a remainder of 31.
Use 9 as the next digit of our solution. 
Result so far: 1273.40659
Subtract 819 from 850 to get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Advancing to step 12:
The number 91 fits into 310 3 times, leaving a remainder of 37.
Use 3 as the next digit of our solution. 
Result so far: 1273.406593
Subtract 273 from 310 to get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Going ahead to step 13:
If we divide 370 by 91, we get 4 and a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 1273.4065934
The remainder is 6 after subtracting 364 from 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 14:
If we divide 60 by 91, we get 0 and a remainder of 60.
Write down 0 as next digit of the result. 
Result so far: 1273.4065934
Subtract 0 from 60 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Our division results in 1273.4065934 with a remaining 6e-08.