Let's divide 268239 by 91
The aim is to understand the frequency of 91 in 268239.

Going ahead to step 1:
91 can be fit into 2 0 times, resulting in a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Take the next digit (6) from the dividend and append it to 2, then repeat: 26 / 91

Moving on to step 2:
If we divide 26 by 91, we get 0 and a remainder of 26.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 26, we get 26.
Grab the next digit (8) from the dividend, add it to 26, then carry on: 268 / 91

Moving on to step 3:
When dividing 268 by 91, we get 2 with a remainder of 86.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we subtract 182 from 268, we get 86.
Bring next digit (2) of the dividend behind the 86 and repeat the process: 862 / 91

Advancing to step 4:
The number 91 fits into 862 9 times, leaving a remainder of 43.
The number 9 becomes the next digit in our result. 
Result so far: 29.0
Subtract 819 from 862 to get 43.
Append the next digit (3) from the dividend to 43 and continue with: 433 / 91

Let's proceed to step 5:
91 can be fit into 433 4 times, resulting in a remainder of 69.
Record the quotient 4 as the next digit in the result. 
Result so far: 294.0
If we subtract 364 from 433, we get 69.
Append the next digit (9) from the dividend to 69 and continue with: 699 / 91

Advancing to step 6:
If we divide 699 by 91, we get 7 and a remainder of 62.
Put 7 as the next digit of the answer. 
Result so far: 2947.0
Subtract 637 from 699 to get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Going ahead to step 7:
91 goes into 620 6 times with a remainder of 74.
The next digit of our result is 6. 
Result so far: 2947.6
If we subtract 546 from 620, we get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

On to step 8:
740 divided by 91 is 8 with a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 2947.68
Subtract 728 from 740 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 9:
91 goes into 120 1 times with a remainder of 29.
Use 1 as the next digit of our solution. 
Result so far: 2947.681
Subtracting 91 from 120 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Advancing to step 10:
91 goes into 290 3 times with a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 2947.6813
Subtracting 273 from 290 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 11:
The number 91 fits into 170 1 times, leaving a remainder of 79.
Put 1 as the next digit of the answer. 
Result so far: 2947.68131
If we take 91 away from 170, we end up with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Going ahead to step 12:
91 goes into 790 8 times with a remainder of 62.
Put 8 as the next digit of the answer. 
Result so far: 2947.681318
If we take 728 away from 790, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

On to step 13:
91 can be fit into 620 6 times, resulting in a remainder of 74.
Record the quotient 6 as the next digit in the result. 
Result so far: 2947.6813186
The remainder is 74 after subtracting 546 from 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Moving on to step 14:
When dividing 740 by 91, we get 8 with a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 2947.68131868
If we subtract 728 from 740, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The final result is 2947.68131868 with a remainder of 1.2e-08.