828042 divided by 15 
The aim is to understand the frequency of 15 in 828042.

Advancing to step 1:
8 divided by 15 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (2) from the dividend, attach it to 8 and continue: 82 / 15

On to step 2:
When dividing 82 by 15, we get 5 with a remainder of 7.
Use 5 as the next digit of our solution. 
Result so far: 5.0
If we take 75 away from 82, we end up with 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 15

Let's proceed to step 3:
15 can be fit into 78 5 times, resulting in a remainder of 3.
Write down 5 as next digit of the result. 
Result so far: 55.0
If we take 75 away from 78, we end up with 3.
Append the next digit (0) from the dividend to 3 and continue with: 30 / 15

Moving on to step 4:
15 goes into 30 2 times with a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 552.0
Deduct 30 from 30 and we're left with 0.
Grab the next digit (4) from the dividend, add it to 0, then carry on: 4 / 15

Going ahead to step 5:
When dividing 4 by 15, we get 0 with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 5520.0
If we take 0 away from 4, we end up with 4.
Fetch the next digit (2) from the dividend, attach it to 4 and continue: 42 / 15

Moving on to step 6:
15 goes into 42 2 times with a remainder of 12.
Put 2 as the next digit of the answer. 
Result so far: 55202.0
The remainder is 12 after subtracting 30 from 42.
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:
15 goes into 120 8 times with a remainder of 0.
Put 8 as the next digit of the answer. 
Result so far: 55202.8
Subtracting 120 from 120 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.

Advancing to step 8:
15 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 55202.8
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.

Going ahead to step 9:
15 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 55202.8
If we subtract 0 from 0, we 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.

The final result is 55202.8 with a remainder of 0.0.