Let's divide 800235 by 15
The aim is to understand the frequency of 15 in 800235.

Advancing 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
The remainder is 8 after subtracting 0 from 8.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 15

Moving on to step 2:
80 divided by 15 is 5 with a remainder of 5.
The next digit of our result is 5. 
Result so far: 5.0
Deduct 75 from 80 and we're left with 5.
Grab the next digit (0) from the dividend, add it to 5, then carry on: 50 / 15

Let's proceed to step 3:
When dividing 50 by 15, we get 3 with a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 53.0
If we take 45 away from 50, we end up with 5.
Include the next digit (2) from the dividend after 5, then repeat: 52 / 15

Going ahead to step 4:
The number 15 fits into 52 3 times, leaving a remainder of 7.
Write down 3 as next digit of the result. 
Result so far: 533.0
Deduct 45 from 52 and we're left with 7.
Fetch the next digit (3) from the dividend, attach it to 7 and continue: 73 / 15

Advancing to step 5:
15 can be fit into 73 4 times, resulting in a remainder of 13.
Record the quotient 4 as the next digit in the result. 
Result so far: 5334.0
Deduct 60 from 73 and we're left with 13.
Bring next digit (5) of the dividend behind the 13 and repeat the process: 135 / 15

Moving on to step 6:
The number 15 fits into 135 9 times, leaving a remainder of 0.
Write down 9 as next digit of the result. 
Result so far: 53349.0
If we take 135 away from 135, we end up 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 7:
0 divided by 15 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 53349.0
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.

On to step 8:
The number 15 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 53349.0
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.

Our division results in 53349.0 with a remaining 0.0.