We're dividing 172406 by 99 
The aim is to understand the frequency of 99 in 172406.

On to step 1:
1 divided by 99 is 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 99

Let's proceed to step 2:
The number 99 fits into 17 0 times, leaving a remainder of 17.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 17 and we're left with 17.
Append the next digit (2) from the dividend to 17 and continue with: 172 / 99

Advancing to step 3:
99 can be fit into 172 1 times, resulting in a remainder of 73.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 99 from 172, we get 73.
Append the next digit (4) from the dividend to 73 and continue with: 734 / 99

Step 4:
734 divided by 99 is 7 with a remainder of 41.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
Subtracting 693 from 734 leaves us with 41.
Take the next digit (0) from the dividend and append it to 41, then repeat: 410 / 99

Moving on to step 5:
99 goes into 410 4 times with a remainder of 14.
Put 4 as the next digit of the answer. 
Result so far: 174.0
The remainder is 14 after subtracting 396 from 410.
Append the next digit (6) from the dividend to 14 and continue with: 146 / 99

Advancing to step 6:
99 goes into 146 1 times with a remainder of 47.
The number 1 becomes the next digit in our result. 
Result so far: 1741.0
If we subtract 99 from 146, we get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Going ahead to step 7:
When dividing 470 by 99, we get 4 with a remainder of 74.
Put 4 as the next digit of the answer. 
Result so far: 1741.4
Deduct 396 from 470 and we're left with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

On to step 8:
When dividing 740 by 99, we get 7 with a remainder of 47.
The number 7 becomes the next digit in our result. 
Result so far: 1741.47
If we take 693 away from 740, we end up with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Going ahead to step 9:
470 divided by 99 is 4 with a remainder of 74.
The next digit of our result is 4. 
Result so far: 1741.474
The remainder is 74 after subtracting 396 from 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Moving on to step 10:
When dividing 740 by 99, we get 7 with a remainder of 47.
Put 7 as the next digit of the answer. 
Result so far: 1741.4747
Deduct 693 from 740 and we're left with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Advancing to step 11:
99 can be fit into 470 4 times, resulting in a remainder of 74.
Use 4 as the next digit of our solution. 
Result so far: 1741.47474
The remainder is 74 after subtracting 396 from 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Advancing to step 12:
740 divided by 99 is 7 with a remainder of 47.
Record the quotient 7 as the next digit in the result. 
Result so far: 1741.474747
Subtracting 693 from 740 leaves us with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Going ahead to step 13:
99 can be fit into 470 4 times, resulting in a remainder of 74.
Put 4 as the next digit of the answer. 
Result so far: 1741.4747474
The remainder is 74 after subtracting 396 from 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Let's proceed to step 14:
99 can be fit into 740 7 times, resulting in a remainder of 47.
Use 7 as the next digit of our solution. 
Result so far: 1741.47474747
If we subtract 693 from 740, we get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

The quotient of the division is 1741.47474747, and the remainder is 4.7e-08.