175421 ÷ 99 
The aim is to understand the frequency of 99 in 175421.

Advancing to step 1:
99 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Take the next digit (7) from the dividend and append it to 1, then repeat: 17 / 99

Going ahead to step 2:
99 can be fit into 17 0 times, resulting in a remainder of 17.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 17, we get 17.
Grab the next digit (5) from the dividend, add it to 17, then carry on: 175 / 99

Going ahead to step 3:
When dividing 175 by 99, we get 1 with a remainder of 76.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 99 from 175 to get 76.
Bring next digit (4) of the dividend behind the 76 and repeat the process: 764 / 99

On to step 4:
99 goes into 764 7 times with a remainder of 71.
Write down 7 as next digit of the result. 
Result so far: 17.0
Deduct 693 from 764 and we're left with 71.
Include the next digit (2) from the dividend after 71, then repeat: 712 / 99

Moving on to step 5:
99 goes into 712 7 times with a remainder of 19.
Use 7 as the next digit of our solution. 
Result so far: 177.0
If we subtract 693 from 712, we get 19.
Append the next digit (1) from the dividend to 19 and continue with: 191 / 99

On to step 6:
99 goes into 191 1 times with a remainder of 92.
Put 1 as the next digit of the answer. 
Result so far: 1771.0
If we subtract 99 from 191, we get 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

On to step 7:
920 divided by 99 is 9 with a remainder of 29.
Put 9 as the next digit of the answer. 
Result so far: 1771.9
Subtract 891 from 920 to get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Moving on to step 8:
99 can be fit into 290 2 times, resulting in a remainder of 92.
Write down 2 as next digit of the result. 
Result so far: 1771.92
Subtract 198 from 290 to get 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Step 9:
920 divided by 99 is 9 with a remainder of 29.
The next digit of our result is 9. 
Result so far: 1771.929
Deduct 891 from 920 and we're left with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Going ahead to step 10:
If we divide 290 by 99, we get 2 and a remainder of 92.
Write down 2 as next digit of the result. 
Result so far: 1771.9292
If we take 198 away from 290, we end up with 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

On to step 11:
When dividing 920 by 99, we get 9 with a remainder of 29.
Put 9 as the next digit of the answer. 
Result so far: 1771.92929
If we subtract 891 from 920, we get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Moving on to step 12:
If we divide 290 by 99, we get 2 and a remainder of 92.
The number 2 becomes the next digit in our result. 
Result so far: 1771.929292
If we take 198 away from 290, we end up with 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Moving on to step 13:
99 goes into 920 9 times with a remainder of 29.
Use 9 as the next digit of our solution. 
Result so far: 1771.9292929
If we subtract 891 from 920, we get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Moving on to step 14:
The number 99 fits into 290 2 times, leaving a remainder of 92.
Record the quotient 2 as the next digit in the result. 
Result so far: 1771.92929292
If we take 198 away from 290, we end up with 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Our division results in 1771.92929292 with a remaining 9.2e-08.