We divide 818529 by 15
The aim is to understand the frequency of 15 in 818529.

Going ahead to step 1:
8 divided by 15 is 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 15

Going ahead to step 2:
When dividing 81 by 15, we get 5 with a remainder of 6.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
If we subtract 75 from 81, we get 6.
Include the next digit (8) from the dividend after 6, then repeat: 68 / 15

Let's proceed to step 3:
The number 15 fits into 68 4 times, leaving a remainder of 8.
The next digit of our result is 4. 
Result so far: 54.0
The remainder is 8 after subtracting 60 from 68.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 15

Moving on to step 4:
15 goes into 85 5 times with a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 545.0
Deduct 75 from 85 and we're left with 10.
Take the next digit (2) from the dividend and append it to 10, then repeat: 102 / 15

Let's proceed to step 5:
The number 15 fits into 102 6 times, leaving a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 5456.0
If we take 90 away from 102, we end up with 12.
Fetch the next digit (9) from the dividend, attach it to 12 and continue: 129 / 15

Advancing to step 6:
If we divide 129 by 15, we get 8 and a remainder of 9.
Put 8 as the next digit of the answer. 
Result so far: 54568.0
Subtracting 120 from 129 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 7:
The number 15 fits into 90 6 times, leaving a remainder of 0.
The next digit of our result is 6. 
Result so far: 54568.6
Subtract 90 from 90 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.

Going ahead to step 8:
If we divide 0 by 15, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 54568.6
Subtract 0 from 0 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 9:
The number 15 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 54568.6
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.

The final outcome is 54568.6, with a leftover of 0.0.