Let's divide 642075 by 15
The aim is to understand the frequency of 15 in 642075.

Advancing to step 1:
6 divided by 15 is 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 15

Let's proceed to step 2:
15 can be fit into 64 4 times, resulting in a remainder of 4.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
The remainder is 4 after subtracting 60 from 64.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 15

Going ahead to step 3:
15 goes into 42 2 times with a remainder of 12.
The number 2 becomes the next digit in our result. 
Result so far: 42.0
If we take 30 away from 42, we end up with 12.
Append the next digit (0) from the dividend to 12 and continue with: 120 / 15

Let's proceed to step 4:
120 divided by 15 is 8 with a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 428.0
Subtract 120 from 120 to get 0.
Take the next digit (7) from the dividend and append it to 0, then repeat: 7 / 15

Step 5:
15 can be fit into 7 0 times, resulting in a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 4280.0
If we subtract 0 from 7, we get 7.
Bring next digit (5) of the dividend behind the 7 and repeat the process: 75 / 15

Moving on to step 6:
75 divided by 15 is 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 42805.0
Deduct 75 from 75 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.

Step 7:
15 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 42805.0
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.

Advancing to step 8:
0 divided by 15 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 42805.0
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 result is 42805.0 with a remainder of 0.0.