289231 ÷ 99 
The aim is to understand the frequency of 99 in 289231.

Step 1:
2 divided by 99 is 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 99

Step 2:
28 divided by 99 is 0 with a remainder of 28.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 28 and we're left with 28.
Include the next digit (9) from the dividend after 28, then repeat: 289 / 99

Going ahead to step 3:
99 goes into 289 2 times with a remainder of 91.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 198 from 289, we get 91.
Fetch the next digit (2) from the dividend, attach it to 91 and continue: 912 / 99

Advancing to step 4:
The number 99 fits into 912 9 times, leaving a remainder of 21.
Write down 9 as next digit of the result. 
Result so far: 29.0
Deduct 891 from 912 and we're left with 21.
Append the next digit (3) from the dividend to 21 and continue with: 213 / 99

Step 5:
The number 99 fits into 213 2 times, leaving a remainder of 15.
Record the quotient 2 as the next digit in the result. 
Result so far: 292.0
If we take 198 away from 213, we end up with 15.
Include the next digit (1) from the dividend after 15, then repeat: 151 / 99

Going ahead to step 6:
99 can be fit into 151 1 times, resulting in a remainder of 52.
Write down 1 as next digit of the result. 
Result so far: 2921.0
Deduct 99 from 151 and we're left with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 7:
If we divide 520 by 99, we get 5 and a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 2921.5
Subtracting 495 from 520 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 8:
When dividing 250 by 99, we get 2 with a remainder of 52.
Put 2 as the next digit of the answer. 
Result so far: 2921.52
Subtracting 198 from 250 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 9:
The number 99 fits into 520 5 times, leaving a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 2921.525
If we subtract 495 from 520, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 10:
99 goes into 250 2 times with a remainder of 52.
Use 2 as the next digit of our solution. 
Result so far: 2921.5252
Subtract 198 from 250 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Step 11:
When dividing 520 by 99, we get 5 with a remainder of 25.
Record the quotient 5 as the next digit in the result. 
Result so far: 2921.52525
Deduct 495 from 520 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 12:
If we divide 250 by 99, we get 2 and a remainder of 52.
The number 2 becomes the next digit in our result. 
Result so far: 2921.525252
Subtract 198 from 250 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 13:
When dividing 520 by 99, we get 5 with a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 2921.5252525
Deduct 495 from 520 and we're left with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 14:
If we divide 250 by 99, we get 2 and a remainder of 52.
Put 2 as the next digit of the answer. 
Result so far: 2921.52525252
If we take 198 away from 250, we end up with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Our division results in 2921.52525252 with a remaining 5.2e-08.