559733 divided by 91 
The aim is to understand the frequency of 91 in 559733.

Step 1:
When dividing 5 by 91, we get 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Include the next digit (5) from the dividend after 5, then repeat: 55 / 91

Step 2:
The number 91 fits into 55 0 times, leaving a remainder of 55.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 55 leaves us with 55.
Take the next digit (9) from the dividend and append it to 55, then repeat: 559 / 91

Moving on to step 3:
When dividing 559 by 91, we get 6 with a remainder of 13.
Write down 6 as next digit of the result. 
Result so far: 6.0
If we subtract 546 from 559, we get 13.
Fetch the next digit (7) from the dividend, attach it to 13 and continue: 137 / 91

Step 4:
When dividing 137 by 91, we get 1 with a remainder of 46.
Record the quotient 1 as the next digit in the result. 
Result so far: 61.0
If we subtract 91 from 137, we get 46.
Append the next digit (3) from the dividend to 46 and continue with: 463 / 91

On to step 5:
The number 91 fits into 463 5 times, leaving a remainder of 8.
The number 5 becomes the next digit in our result. 
Result so far: 615.0
The remainder is 8 after subtracting 455 from 463.
Include the next digit (3) from the dividend after 8, then repeat: 83 / 91

Let's proceed to step 6:
If we divide 83 by 91, we get 0 and a remainder of 83.
The number 0 becomes the next digit in our result. 
Result so far: 6150.0
If we subtract 0 from 83, we get 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Moving on to step 7:
If we divide 830 by 91, we get 9 and a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 6150.9
If we subtract 819 from 830, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 8:
91 can be fit into 110 1 times, resulting in a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 6150.91
If we subtract 91 from 110, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 9:
When dividing 190 by 91, we get 2 with a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 6150.912
Deduct 182 from 190 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 10:
If we divide 80 by 91, we get 0 and a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 6150.912
Subtract 0 from 80 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Moving on to step 11:
The number 91 fits into 800 8 times, leaving a remainder of 72.
Write down 8 as next digit of the result. 
Result so far: 6150.91208
The remainder is 72 after subtracting 728 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

On to step 12:
91 can be fit into 720 7 times, resulting in a remainder of 83.
The number 7 becomes the next digit in our result. 
Result so far: 6150.912087
Deduct 637 from 720 and we're left with 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Step 13:
91 can be fit into 830 9 times, resulting in a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 6150.9120879
Subtracting 819 from 830 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 14:
If we divide 110 by 91, we get 1 and a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 6150.91208791
Deduct 91 from 110 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

The final outcome is 6150.91208791, with a leftover of 1.9e-08.