Let's divide 123816 by 99
The aim is to understand the frequency of 99 in 123816.

Going ahead to step 1:
If we divide 1 by 99, we get 0 and a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 99

Step 2:
12 divided by 99 is 0 with a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 12 after subtracting 0 from 12.
Include the next digit (3) from the dividend after 12, then repeat: 123 / 99

Step 3:
123 divided by 99 is 1 with a remainder of 24.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 99 from 123, we get 24.
Append the next digit (8) from the dividend to 24 and continue with: 248 / 99

Going ahead to step 4:
If we divide 248 by 99, we get 2 and a remainder of 50.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Subtracting 198 from 248 leaves us with 50.
Append the next digit (1) from the dividend to 50 and continue with: 501 / 99

Going ahead to step 5:
If we divide 501 by 99, we get 5 and a remainder of 6.
The next digit of our result is 5. 
Result so far: 125.0
Subtract 495 from 501 to get 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 99

Step 6:
99 goes into 66 0 times with a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 1250.0
The remainder is 66 after subtracting 0 from 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Advancing to step 7:
The number 99 fits into 660 6 times, leaving a remainder of 66.
Use 6 as the next digit of our solution. 
Result so far: 1250.6
If we take 594 away from 660, we end up with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Moving on to step 8:
When dividing 660 by 99, we get 6 with a remainder of 66.
Put 6 as the next digit of the answer. 
Result so far: 1250.66
Subtract 594 from 660 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

The final result is 1250.66 with a remainder of 0.066.