We look at the division of 184120 by 15 
The aim is to understand the frequency of 15 in 184120.

Advancing to step 1:
1 divided by 15 is 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 15

Going ahead to step 2:
When dividing 18 by 15, we get 1 with a remainder of 3.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 3 after subtracting 15 from 18.
Include the next digit (4) from the dividend after 3, then repeat: 34 / 15

Let's proceed to step 3:
If we divide 34 by 15, we get 2 and a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
Subtracting 30 from 34 leaves us with 4.
Fetch the next digit (1) from the dividend, attach it to 4 and continue: 41 / 15

Advancing to step 4:
15 goes into 41 2 times with a remainder of 11.
The number 2 becomes the next digit in our result. 
Result so far: 122.0
Subtracting 30 from 41 leaves us with 11.
Bring next digit (2) of the dividend behind the 11 and repeat the process: 112 / 15

On to step 5:
When dividing 112 by 15, we get 7 with a remainder of 7.
Put 7 as the next digit of the answer. 
Result so far: 1227.0
If we subtract 105 from 112, we get 7.
Fetch the next digit (0) from the dividend, attach it to 7 and continue: 70 / 15

Going ahead to step 6:
15 can be fit into 70 4 times, resulting in a remainder of 10.
The next digit of our result is 4. 
Result so far: 12274.0
The remainder is 10 after subtracting 60 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 7:
15 goes into 100 6 times with a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 12274.6
If we subtract 90 from 100, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
The number 15 fits into 100 6 times, leaving a remainder of 10.
Put 6 as the next digit of the answer. 
Result so far: 12274.66
Subtract 90 from 100 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final outcome is 12274.66, with a leftover of 0.01.