We divide 866303 by 91
The aim is to understand the frequency of 91 in 866303.

On to step 1:
91 goes into 8 0 times with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 91

Step 2:
86 divided by 91 is 0 with a remainder of 86.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 86, we get 86.
Grab the next digit (6) from the dividend, add it to 86, then carry on: 866 / 91

Moving on to step 3:
91 can be fit into 866 9 times, resulting in a remainder of 47.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtract 819 from 866 to get 47.
Append the next digit (3) from the dividend to 47 and continue with: 473 / 91

Going ahead to step 4:
The number 91 fits into 473 5 times, leaving a remainder of 18.
Record the quotient 5 as the next digit in the result. 
Result so far: 95.0
Subtracting 455 from 473 leaves us with 18.
Fetch the next digit (0) from the dividend, attach it to 18 and continue: 180 / 91

Let's proceed to step 5:
91 goes into 180 1 times with a remainder of 89.
Put 1 as the next digit of the answer. 
Result so far: 951.0
If we subtract 91 from 180, we get 89.
Append the next digit (3) from the dividend to 89 and continue with: 893 / 91

Going ahead to step 6:
91 can be fit into 893 9 times, resulting in a remainder of 74.
Use 9 as the next digit of our solution. 
Result so far: 9519.0
Subtracting 819 from 893 leaves us with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Advancing to step 7:
If we divide 740 by 91, we get 8 and a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 9519.8
The remainder is 12 after subtracting 728 from 740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 8:
91 can be fit into 120 1 times, resulting in a remainder of 29.
The number 1 becomes the next digit in our result. 
Result so far: 9519.81
If we take 91 away from 120, we end up 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.

Moving on to step 9:
91 can be fit into 290 3 times, resulting in a remainder of 17.
Use 3 as the next digit of our solution. 
Result so far: 9519.813
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.

Step 10:
The number 91 fits into 170 1 times, leaving a remainder of 79.
The number 1 becomes the next digit in our result. 
Result so far: 9519.8131
Deduct 91 from 170 and we're left 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.

Advancing to step 11:
91 can be fit into 790 8 times, resulting in a remainder of 62.
Write down 8 as next digit of the result. 
Result so far: 9519.81318
The remainder is 62 after subtracting 728 from 790.
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 12:
If we divide 620 by 91, we get 6 and a remainder of 74.
Record the quotient 6 as the next digit in the result. 
Result so far: 9519.813186
Deduct 546 from 620 and we're left with 74.
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 13:
If we divide 740 by 91, we get 8 and a remainder of 12.
The next digit of our result is 8. 
Result so far: 9519.8131868
If we take 728 away from 740, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 14:
91 goes into 120 1 times with a remainder of 29.
Record the quotient 1 as the next digit in the result. 
Result so far: 9519.81318681
If we take 91 away from 120, we end up 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.

After the division, we end up with 9519.81318681 and a remainder of 2.9e-08.