128714 divided by 91 
The aim is to understand the frequency of 91 in 128714.

Step 1:
1 divided by 91 is 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 91

On to step 2:
12 divided by 91 is 0 with a remainder of 12.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 12 to get 12.
Take the next digit (8) from the dividend and append it to 12, then repeat: 128 / 91

Moving on to step 3:
91 goes into 128 1 times with a remainder of 37.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 37 after subtracting 91 from 128.
Append the next digit (7) from the dividend to 37 and continue with: 377 / 91

Advancing to step 4:
If we divide 377 by 91, we get 4 and a remainder of 13.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
The remainder is 13 after subtracting 364 from 377.
Append the next digit (1) from the dividend to 13 and continue with: 131 / 91

Advancing to step 5:
91 can be fit into 131 1 times, resulting in a remainder of 40.
Write down 1 as next digit of the result. 
Result so far: 141.0
Subtracting 91 from 131 leaves us with 40.
Include the next digit (4) from the dividend after 40, then repeat: 404 / 91

Step 6:
91 goes into 404 4 times with a remainder of 40.
Use 4 as the next digit of our solution. 
Result so far: 1414.0
If we take 364 away from 404, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 7:
400 divided by 91 is 4 with a remainder of 36.
Put 4 as the next digit of the answer. 
Result so far: 1414.4
The remainder is 36 after subtracting 364 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 8:
91 goes into 360 3 times with a remainder of 87.
Use 3 as the next digit of our solution. 
Result so far: 1414.43
Subtracting 273 from 360 leaves us with 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Moving on to step 9:
91 can be fit into 870 9 times, resulting in a remainder of 51.
Write down 9 as next digit of the result. 
Result so far: 1414.439
If we take 819 away from 870, we end up with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Let's proceed to step 10:
91 goes into 510 5 times with a remainder of 55.
Use 5 as the next digit of our solution. 
Result so far: 1414.4395
Subtracting 455 from 510 leaves us with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Advancing to step 11:
The number 91 fits into 550 6 times, leaving a remainder of 4.
The next digit of our result is 6. 
Result so far: 1414.43956
If we subtract 546 from 550, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 12:
If we divide 40 by 91, we get 0 and a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 1414.43956
If we take 0 away from 40, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 13:
When dividing 400 by 91, we get 4 with a remainder of 36.
Record the quotient 4 as the next digit in the result. 
Result so far: 1414.4395604
If we take 364 away from 400, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 14:
If we divide 360 by 91, we get 3 and a remainder of 87.
Record the quotient 3 as the next digit in the result. 
Result so far: 1414.43956043
Deduct 273 from 360 and we're left with 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Our division results in 1414.43956043 with a remaining 8.7e-08.