We look at the division of 90743124 by 99 
The aim is to understand the frequency of 99 in 90743124.

Step 1:
99 goes into 9 0 times with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 99

Going ahead to step 2:
99 goes into 90 0 times with a remainder of 90.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 90 and we're left with 90.
Take the next digit (7) from the dividend and append it to 90, then repeat: 907 / 99

On to step 3:
If we divide 907 by 99, we get 9 and a remainder of 16.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtract 891 from 907 to get 16.
Take the next digit (4) from the dividend and append it to 16, then repeat: 164 / 99

On to step 4:
99 goes into 164 1 times with a remainder of 65.
Record the quotient 1 as the next digit in the result. 
Result so far: 91.0
If we take 99 away from 164, we end up with 65.
Take the next digit (3) from the dividend and append it to 65, then repeat: 653 / 99

Let's proceed to step 5:
When dividing 653 by 99, we get 6 with a remainder of 59.
Record the quotient 6 as the next digit in the result. 
Result so far: 916.0
Subtract 594 from 653 to get 59.
Append the next digit (1) from the dividend to 59 and continue with: 591 / 99

Going ahead to step 6:
591 divided by 99 is 5 with a remainder of 96.
The number 5 becomes the next digit in our result. 
Result so far: 9165.0
If we take 495 away from 591, we end up with 96.
Fetch the next digit (2) from the dividend, attach it to 96 and continue: 962 / 99

Moving on to step 7:
When dividing 962 by 99, we get 9 with a remainder of 71.
The next digit of our result is 9. 
Result so far: 91659.0
Subtract 891 from 962 to get 71.
Append the next digit (4) from the dividend to 71 and continue with: 714 / 99

Going ahead to step 8:
If we divide 714 by 99, we get 7 and a remainder of 21.
Write down 7 as next digit of the result. 
Result so far: 916597.0
The remainder is 21 after subtracting 693 from 714.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Moving on to step 9:
When dividing 210 by 99, we get 2 with a remainder of 12.
Record the quotient 2 as the next digit in the result. 
Result so far: 916597.2
Subtracting 198 from 210 leaves us 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.

Moving on to step 10:
When dividing 120 by 99, we get 1 with a remainder of 21.
Write down 1 as next digit of the result. 
Result so far: 916597.21
Subtracting 99 from 120 leaves us with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Moving on to step 11:
99 goes into 210 2 times with a remainder of 12.
Write down 2 as next digit of the result. 
Result so far: 916597.212
Subtracting 198 from 210 leaves us 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.

On to step 12:
The number 99 fits into 120 1 times, leaving a remainder of 21.
Put 1 as the next digit of the answer. 
Result so far: 916597.2121
Subtract 99 from 120 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 13:
When dividing 210 by 99, we get 2 with a remainder of 12.
Record the quotient 2 as the next digit in the result. 
Result so far: 916597.21212
If we subtract 198 from 210, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 14:
99 goes into 120 1 times with a remainder of 21.
Put 1 as the next digit of the answer. 
Result so far: 916597.212121
If we subtract 99 from 120, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 15:
If we divide 210 by 99, we get 2 and a remainder of 12.
Write down 2 as next digit of the result. 
Result so far: 916597.2121212
If we take 198 away from 210, 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.

Advancing to step 16:
When dividing 120 by 99, we get 1 with a remainder of 21.
Put 1 as the next digit of the answer. 
Result so far: 916597.21212121
Deduct 99 from 120 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

The final result is 916597.21212121 with a remainder of 2.1e-08.