315675 divided by 15 
The aim is to understand the frequency of 15 in 315675.

Advancing to step 1:
15 goes into 3 0 times with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Grab the next digit (1) from the dividend, add it to 3, then carry on: 31 / 15

Moving on to step 2:
When dividing 31 by 15, we get 2 with a remainder of 1.
The next digit of our result is 2. 
Result so far: 2.0
If we take 30 away from 31, we end up with 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 15

Let's proceed to step 3:
15 can be fit into 15 1 times, resulting in a remainder of 0.
The number 1 becomes the next digit in our result. 
Result so far: 21.0
The remainder is 0 after subtracting 15 from 15.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 15

Going ahead to step 4:
6 divided by 15 is 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 210.0
The remainder is 6 after subtracting 0 from 6.
Append the next digit (7) from the dividend to 6 and continue with: 67 / 15

On to step 5:
15 goes into 67 4 times with a remainder of 7.
Record the quotient 4 as the next digit in the result. 
Result so far: 2104.0
Subtract 60 from 67 to get 7.
Bring next digit (5) of the dividend behind the 7 and repeat the process: 75 / 15

Step 6:
75 divided by 15 is 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 21045.0
If we subtract 75 from 75, 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 7:
15 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 21045.0
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.

On 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: 21045.0
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.

The final outcome is 21045.0, with a leftover of 0.0.