We look at the division of 48657 by 15 
The aim is to understand the frequency of 15 in 48657.

On to step 1:
15 can be fit into 4 0 times, resulting in a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Fetch the next digit (8) from the dividend, attach it to 4 and continue: 48 / 15

Let's proceed to step 2:
The number 15 fits into 48 3 times, leaving a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtract 45 from 48 to get 3.
Take the next digit (6) from the dividend and append it to 3, then repeat: 36 / 15

Step 3:
When dividing 36 by 15, we get 2 with a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 32.0
If we subtract 30 from 36, we get 6.
Append the next digit (5) from the dividend to 6 and continue with: 65 / 15

Step 4:
If we divide 65 by 15, we get 4 and a remainder of 5.
The number 4 becomes the next digit in our result. 
Result so far: 324.0
The remainder is 5 after subtracting 60 from 65.
Append the next digit (7) from the dividend to 5 and continue with: 57 / 15

On to step 5:
The number 15 fits into 57 3 times, leaving a remainder of 12.
The number 3 becomes the next digit in our result. 
Result so far: 3243.0
Subtracting 45 from 57 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 6:
15 goes into 120 8 times with a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 3243.8
If we take 120 away from 120, 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.

Let's proceed to 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: 3243.8
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.

Let's proceed 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: 3243.8
The remainder is 0 after subtracting 0 from 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 3243.8 with a remaining 0.0.