158330 divided by 99 
The aim is to understand the frequency of 99 in 158330.

Step 1:
1 divided by 99 is 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 99

Moving on to step 2:
If we divide 15 by 99, we get 0 and a remainder of 15.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 15 and we're left with 15.
Bring next digit (8) of the dividend behind the 15 and repeat the process: 158 / 99

Moving on to step 3:
The number 99 fits into 158 1 times, leaving a remainder of 59.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 99 from 158 leaves us with 59.
Fetch the next digit (3) from the dividend, attach it to 59 and continue: 593 / 99

On to step 4:
If we divide 593 by 99, we get 5 and a remainder of 98.
Use 5 as the next digit of our solution. 
Result so far: 15.0
Deduct 495 from 593 and we're left with 98.
Include the next digit (3) from the dividend after 98, then repeat: 983 / 99

On to step 5:
99 can be fit into 983 9 times, resulting in a remainder of 92.
Write down 9 as next digit of the result. 
Result so far: 159.0
Subtract 891 from 983 to get 92.
Append the next digit (0) from the dividend to 92 and continue with: 920 / 99

Going ahead to step 6:
920 divided by 99 is 9 with a remainder of 29.
The next digit of our result is 9. 
Result so far: 1599.0
If we take 891 away from 920, we end up 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.

Let's proceed to step 7:
99 goes into 290 2 times with a remainder of 92.
The number 2 becomes the next digit in our result. 
Result so far: 1599.2
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.

Advancing to step 8:
920 divided by 99 is 9 with a remainder of 29.
The number 9 becomes the next digit in our result. 
Result so far: 1599.29
If we take 891 away from 920, we end up 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.

On to step 9:
99 can be fit into 290 2 times, resulting in a remainder of 92.
Record the quotient 2 as the next digit in the result. 
Result so far: 1599.292
Subtracting 198 from 290 leaves us 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 10:
If we divide 920 by 99, we get 9 and a remainder of 29.
Write down 9 as next digit of the result. 
Result so far: 1599.2929
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.

On to step 11:
When dividing 290 by 99, we get 2 with a remainder of 92.
Write down 2 as next digit of the result. 
Result so far: 1599.29292
The remainder is 92 after subtracting 198 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Going ahead to step 12:
99 can be fit into 920 9 times, resulting in a remainder of 29.
Use 9 as the next digit of our solution. 
Result so far: 1599.292929
The remainder is 29 after subtracting 891 from 920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Let's proceed to step 13:
When dividing 290 by 99, we get 2 with a remainder of 92.
Put 2 as the next digit of the answer. 
Result so far: 1599.2929292
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 14:
If we divide 920 by 99, we get 9 and a remainder of 29.
Record the quotient 9 as the next digit in the result. 
Result so far: 1599.29292929
If we take 891 away from 920, we end up 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.

After the division, we end up with 1599.29292929 and a remainder of 2.9e-08.