We look at the division of 558252 by 15 
The aim is to understand the frequency of 15 in 558252.

On to step 1:
When dividing 5 by 15, we get 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Grab the next digit (5) from the dividend, add it to 5, then carry on: 55 / 15

On to step 2:
If we divide 55 by 15, we get 3 and a remainder of 10.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we subtract 45 from 55, we get 10.
Append the next digit (8) from the dividend to 10 and continue with: 108 / 15

On to step 3:
15 goes into 108 7 times with a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 37.0
Subtracting 105 from 108 leaves us with 3.
Take the next digit (2) from the dividend and append it to 3, then repeat: 32 / 15

Going ahead to step 4:
32 divided by 15 is 2 with a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 372.0
If we subtract 30 from 32, we get 2.
Grab the next digit (5) from the dividend, add it to 2, then carry on: 25 / 15

Step 5:
15 can be fit into 25 1 times, resulting in a remainder of 10.
The next digit of our result is 1. 
Result so far: 3721.0
The remainder is 10 after subtracting 15 from 25.
Bring next digit (2) of the dividend behind the 10 and repeat the process: 102 / 15

Going ahead to step 6:
102 divided by 15 is 6 with a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 37216.0
The remainder is 12 after subtracting 90 from 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 7:
The number 15 fits into 120 8 times, leaving a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 37216.8
Subtract 120 from 120 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 8:
0 divided by 15 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 37216.8
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 9:
15 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 37216.8
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 37216.8, with a leftover of 0.0.