Let's divide 981608 by 91
The aim is to understand the frequency of 91 in 981608.

Advancing to step 1:
91 can be fit into 9 0 times, resulting in a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Grab the next digit (8) from the dividend, add it to 9, then carry on: 98 / 91

Going ahead to step 2:
When dividing 98 by 91, we get 1 with a remainder of 7.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 91 from 98 and we're left with 7.
Include the next digit (1) from the dividend after 7, then repeat: 71 / 91

Going ahead to step 3:
When dividing 71 by 91, we get 0 with a remainder of 71.
The next digit of our result is 0. 
Result so far: 10.0
The remainder is 71 after subtracting 0 from 71.
Grab the next digit (6) from the dividend, add it to 71, then carry on: 716 / 91

Let's proceed to step 4:
When dividing 716 by 91, we get 7 with a remainder of 79.
The next digit of our result is 7. 
Result so far: 107.0
If we take 637 away from 716, we end up with 79.
Include the next digit (0) from the dividend after 79, then repeat: 790 / 91

Moving on to step 5:
790 divided by 91 is 8 with a remainder of 62.
Write down 8 as next digit of the result. 
Result so far: 1078.0
Deduct 728 from 790 and we're left with 62.
Append the next digit (8) from the dividend to 62 and continue with: 628 / 91

On to step 6:
If we divide 628 by 91, we get 6 and a remainder of 82.
Put 6 as the next digit of the answer. 
Result so far: 10786.0
Subtract 546 from 628 to 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.

Moving on to step 7:
When dividing 820 by 91, we get 9 with a remainder of 1.
The next digit of our result is 9. 
Result so far: 10786.9
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.

On to step 8:
91 goes into 10 0 times with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 10786.9
Subtracting 0 from 10 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 9:
91 goes into 100 1 times with a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 10786.901
Deduct 91 from 100 and we're left 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.

On to step 10:
If we divide 90 by 91, we get 0 and a remainder of 90.
Write down 0 as next digit of the result. 
Result so far: 10786.901
If we subtract 0 from 90, we get 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:
When dividing 900 by 91, we get 9 with a remainder of 81.
Write down 9 as next digit of the result. 
Result so far: 10786.90109
If we subtract 819 from 900, we get 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Moving on to step 12:
91 can be fit into 810 8 times, resulting in a remainder of 82.
Put 8 as the next digit of the answer. 
Result so far: 10786.901098
If we take 728 away from 810, we end up 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.

Going ahead to step 13:
91 can be fit into 820 9 times, resulting in a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 10786.9010989
Deduct 819 from 820 and we're left 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.

Going ahead to step 14:
If we divide 10 by 91, we get 0 and a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 10786.9010989
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

After the division, we end up with 10786.9010989 and a remainder of 1e-08.