We're dividing 15180030 by 99 
The aim is to understand the frequency of 99 in 15180030.

Going ahead to step 1:
If we divide 1 by 99, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 99

Moving on to step 2:
99 goes into 15 0 times with a remainder of 15.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 15 to get 15.
Grab the next digit (1) from the dividend, add it to 15, then carry on: 151 / 99

Step 3:
If we divide 151 by 99, we get 1 and a remainder of 52.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 99 from 151 leaves us with 52.
Append the next digit (8) from the dividend to 52 and continue with: 528 / 99

Advancing to step 4:
99 goes into 528 5 times with a remainder of 33.
Put 5 as the next digit of the answer. 
Result so far: 15.0
Subtracting 495 from 528 leaves us with 33.
Bring next digit (0) of the dividend behind the 33 and repeat the process: 330 / 99

Advancing to step 5:
99 goes into 330 3 times with a remainder of 33.
Put 3 as the next digit of the answer. 
Result so far: 153.0
If we subtract 297 from 330, we get 33.
Append the next digit (0) from the dividend to 33 and continue with: 330 / 99

Step 6:
99 goes into 330 3 times with a remainder of 33.
The number 3 becomes the next digit in our result. 
Result so far: 1533.0
The remainder is 33 after subtracting 297 from 330.
Append the next digit (3) from the dividend to 33 and continue with: 333 / 99

Going ahead to step 7:
99 goes into 333 3 times with a remainder of 36.
Write down 3 as next digit of the result. 
Result so far: 15333.0
If we take 297 away from 333, we end up with 36.
Take the next digit (0) from the dividend and append it to 36, then repeat: 360 / 99

Going ahead to step 8:
99 can be fit into 360 3 times, resulting in a remainder of 63.
Record the quotient 3 as the next digit in the result. 
Result so far: 153333.0
Subtract 297 from 360 to get 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Moving on to step 9:
630 divided by 99 is 6 with a remainder of 36.
Record the quotient 6 as the next digit in the result. 
Result so far: 153333.6
The remainder is 36 after subtracting 594 from 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 10:
When dividing 360 by 99, we get 3 with a remainder of 63.
Use 3 as the next digit of our solution. 
Result so far: 153333.63
If we take 297 away from 360, we end up with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Step 11:
99 can be fit into 630 6 times, resulting in a remainder of 36.
The number 6 becomes the next digit in our result. 
Result so far: 153333.636
Subtract 594 from 630 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 12:
99 goes into 360 3 times with a remainder of 63.
Record the quotient 3 as the next digit in the result. 
Result so far: 153333.6363
Deduct 297 from 360 and we're left with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Moving on to step 13:
If we divide 630 by 99, we get 6 and a remainder of 36.
Write down 6 as next digit of the result. 
Result so far: 153333.63636
Subtracting 594 from 630 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 14:
360 divided by 99 is 3 with a remainder of 63.
Put 3 as the next digit of the answer. 
Result so far: 153333.636363
Subtracting 297 from 360 leaves us with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

On to step 15:
99 can be fit into 630 6 times, resulting in a remainder of 36.
Write down 6 as next digit of the result. 
Result so far: 153333.6363636
Deduct 594 from 630 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

On to step 16:
The number 99 fits into 360 3 times, leaving a remainder of 63.
Write down 3 as next digit of the result. 
Result so far: 153333.63636363
Deduct 297 from 360 and we're left with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

The final outcome is 153333.63636363, with a leftover of 6.3e-08.