806488 ÷ 15 
The aim is to understand the frequency of 15 in 806488.

On to step 1:
When dividing 8 by 15, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Append the next digit (0) from the dividend to 8 and continue with: 80 / 15

Advancing to step 2:
80 divided by 15 is 5 with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 5.0
Subtracting 75 from 80 leaves us with 5.
Include the next digit (6) from the dividend after 5, then repeat: 56 / 15

Let's proceed to step 3:
When dividing 56 by 15, we get 3 with a remainder of 11.
The next digit of our result is 3. 
Result so far: 53.0
If we subtract 45 from 56, we get 11.
Grab the next digit (4) from the dividend, add it to 11, then carry on: 114 / 15

Advancing to step 4:
15 goes into 114 7 times with a remainder of 9.
Use 7 as the next digit of our solution. 
Result so far: 537.0
If we subtract 105 from 114, we get 9.
Grab the next digit (8) from the dividend, add it to 9, then carry on: 98 / 15

Moving on to step 5:
15 goes into 98 6 times with a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 5376.0
If we take 90 away from 98, we end up with 8.
Take the next digit (8) from the dividend and append it to 8, then repeat: 88 / 15

Going ahead to step 6:
88 divided by 15 is 5 with a remainder of 13.
Write down 5 as next digit of the result. 
Result so far: 53765.0
If we subtract 75 from 88, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 7:
130 divided by 15 is 8 with a remainder of 10.
The next digit of our result is 8. 
Result so far: 53765.8
If we subtract 120 from 130, 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.

Moving on to step 8:
15 goes into 100 6 times with a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 53765.86
Subtracting 90 from 100 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 9:
When dividing 100 by 15, we get 6 with a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 53765.866
The remainder is 10 after subtracting 90 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

After the division, we end up with 53765.866 and a remainder of 0.001.