818859 divided by 83 
The aim is to understand the frequency of 83 in 818859.

On to step 1:
83 can be fit into 8 0 times, resulting in a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 83

Step 2:
The number 83 fits into 81 0 times, leaving a remainder of 81.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 81, we end up with 81.
Append the next digit (8) from the dividend to 81 and continue with: 818 / 83

Step 3:
The number 83 fits into 818 9 times, leaving a remainder of 71.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
If we take 747 away from 818, we end up with 71.
Include the next digit (8) from the dividend after 71, then repeat: 718 / 83

Advancing to step 4:
83 goes into 718 8 times with a remainder of 54.
The next digit of our result is 8. 
Result so far: 98.0
Subtract 664 from 718 to get 54.
Bring next digit (5) of the dividend behind the 54 and repeat the process: 545 / 83

Moving on to step 5:
83 goes into 545 6 times with a remainder of 47.
Use 6 as the next digit of our solution. 
Result so far: 986.0
Subtracting 498 from 545 leaves us with 47.
Take the next digit (9) from the dividend and append it to 47, then repeat: 479 / 83

On to step 6:
The number 83 fits into 479 5 times, leaving a remainder of 64.
The next digit of our result is 5. 
Result so far: 9865.0
If we take 415 away from 479, we end up with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Going ahead to step 7:
640 divided by 83 is 7 with a remainder of 59.
Use 7 as the next digit of our solution. 
Result so far: 9865.7
The remainder is 59 after subtracting 581 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

On to step 8:
590 divided by 83 is 7 with a remainder of 9.
Record the quotient 7 as the next digit in the result. 
Result so far: 9865.77
If we subtract 581 from 590, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

The final result is 9865.77 with a remainder of 0.009.