190660 ÷ 15 
The aim is to understand the frequency of 15 in 190660.

On to step 1:
When dividing 1 by 15, we get 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Grab the next digit (9) from the dividend, add it to 1, then carry on: 19 / 15

Moving on to step 2:
19 divided by 15 is 1 with a remainder of 4.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 4 after subtracting 15 from 19.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 15

Moving on to step 3:
The number 15 fits into 40 2 times, leaving a remainder of 10.
Use 2 as the next digit of our solution. 
Result so far: 12.0
If we take 30 away from 40, we end up with 10.
Bring next digit (6) of the dividend behind the 10 and repeat the process: 106 / 15

Going ahead to step 4:
If we divide 106 by 15, we get 7 and a remainder of 1.
The number 7 becomes the next digit in our result. 
Result so far: 127.0
The remainder is 1 after subtracting 105 from 106.
Grab the next digit (6) from the dividend, add it to 1, then carry on: 16 / 15

On to step 5:
15 goes into 16 1 times with a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 1271.0
Deduct 15 from 16 and we're left with 1.
Take the next digit (0) from the dividend and append it to 1, then repeat: 10 / 15

Step 6:
If we divide 10 by 15, we get 0 and a remainder of 10.
The next digit of our result is 0. 
Result so far: 12710.0
If we subtract 0 from 10, 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 7:
When dividing 100 by 15, we get 6 with a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 12710.6
Subtract 90 from 100 to 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.

Going ahead to step 8:
15 goes into 100 6 times with a remainder of 10.
The next digit of our result is 6. 
Result so far: 12710.66
The remainder is 10 after subtracting 90 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

After the division, we end up with 12710.66 and a remainder of 0.01.