123268 ÷ 15 
The aim is to understand the frequency of 15 in 123268.

Advancing to step 1:
1 divided by 15 is 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 15

Going ahead to step 2:
12 divided by 15 is 0 with a remainder of 12.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Fetch the next digit (3) from the dividend, attach it to 12 and continue: 123 / 15

Step 3:
When dividing 123 by 15, we get 8 with a remainder of 3.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
If we take 120 away from 123, we end up with 3.
Append the next digit (2) from the dividend to 3 and continue with: 32 / 15

Advancing to step 4:
If we divide 32 by 15, we get 2 and a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 82.0
The remainder is 2 after subtracting 30 from 32.
Bring next digit (6) of the dividend behind the 2 and repeat the process: 26 / 15

Advancing to step 5:
15 goes into 26 1 times with a remainder of 11.
The next digit of our result is 1. 
Result so far: 821.0
Subtract 15 from 26 to get 11.
Append the next digit (8) from the dividend to 11 and continue with: 118 / 15

Advancing to step 6:
118 divided by 15 is 7 with a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 8217.0
Subtract 105 from 118 to 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.

Moving on to step 7:
When dividing 130 by 15, we get 8 with a remainder of 10.
The number 8 becomes the next digit in our result. 
Result so far: 8217.8
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.

On to step 8:
When dividing 100 by 15, we get 6 with a remainder of 10.
Record the quotient 6 as the next digit in the result. 
Result so far: 8217.86
If we subtract 90 from 100, 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.

Step 9:
The number 15 fits into 100 6 times, leaving a remainder of 10.
Put 6 as the next digit of the answer. 
Result so far: 8217.866
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.

The quotient of the division is 8217.866, and the remainder is 0.001.