803983 divided by 91 
The aim is to understand the frequency of 91 in 803983.

Let's proceed to step 1:
91 can be fit into 8 0 times, resulting in a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 91

Moving on to step 2:
The number 91 fits into 80 0 times, leaving a remainder of 80.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 80 leaves us with 80.
Bring next digit (3) of the dividend behind the 80 and repeat the process: 803 / 91

On to step 3:
When dividing 803 by 91, we get 8 with a remainder of 75.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
If we take 728 away from 803, we end up with 75.
Append the next digit (9) from the dividend to 75 and continue with: 759 / 91

Moving on to step 4:
759 divided by 91 is 8 with a remainder of 31.
Put 8 as the next digit of the answer. 
Result so far: 88.0
The remainder is 31 after subtracting 728 from 759.
Fetch the next digit (8) from the dividend, attach it to 31 and continue: 318 / 91

Going ahead to step 5:
318 divided by 91 is 3 with a remainder of 45.
Use 3 as the next digit of our solution. 
Result so far: 883.0
Subtract 273 from 318 to get 45.
Include the next digit (3) from the dividend after 45, then repeat: 453 / 91

On to step 6:
The number 91 fits into 453 4 times, leaving a remainder of 89.
Write down 4 as next digit of the result. 
Result so far: 8834.0
If we subtract 364 from 453, we get 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Moving on to step 7:
The number 91 fits into 890 9 times, leaving a remainder of 71.
Write down 9 as next digit of the result. 
Result so far: 8834.9
Subtract 819 from 890 to get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Let's proceed to step 8:
When dividing 710 by 91, we get 7 with a remainder of 73.
The next digit of our result is 7. 
Result so far: 8834.97
Subtracting 637 from 710 leaves us with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Going ahead to step 9:
The number 91 fits into 730 8 times, leaving a remainder of 2.
The next digit of our result is 8. 
Result so far: 8834.978
If we subtract 728 from 730, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 10:
When dividing 20 by 91, we get 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 8834.978
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 11:
200 divided by 91 is 2 with a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 8834.97802
Deduct 182 from 200 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 12:
When dividing 180 by 91, we get 1 with a remainder of 89.
The number 1 becomes the next digit in our result. 
Result so far: 8834.978021
Subtract 91 from 180 to get 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

On to step 13:
91 can be fit into 890 9 times, resulting in a remainder of 71.
Put 9 as the next digit of the answer. 
Result so far: 8834.9780219
If we take 819 away from 890, we end up with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Advancing to step 14:
If we divide 710 by 91, we get 7 and a remainder of 73.
Record the quotient 7 as the next digit in the result. 
Result so far: 8834.97802197
If we take 637 away from 710, we end up with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

After the division, we end up with 8834.97802197 and a remainder of 7.3e-08.