Let's divide 191707 by 15
The aim is to understand the frequency of 15 in 191707.

On to step 1:
The number 15 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (9) of the dividend behind the 1 and repeat the process: 19 / 15

Going ahead to step 2:
19 divided by 15 is 1 with a remainder of 4.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 15 from 19 and we're left with 4.
Append the next digit (1) from the dividend to 4 and continue with: 41 / 15

Let's proceed to step 3:
41 divided by 15 is 2 with a remainder of 11.
The next digit of our result is 2. 
Result so far: 12.0
If we take 30 away from 41, we end up with 11.
Append the next digit (7) from the dividend to 11 and continue with: 117 / 15

Step 4:
117 divided by 15 is 7 with a remainder of 12.
Use 7 as the next digit of our solution. 
Result so far: 127.0
Subtracting 105 from 117 leaves us with 12.
Include the next digit (0) from the dividend after 12, then repeat: 120 / 15

Moving on to step 5:
120 divided by 15 is 8 with a remainder of 0.
The next digit of our result is 8. 
Result so far: 1278.0
Subtracting 120 from 120 leaves us with 0.
Grab the next digit (7) from the dividend, add it to 0, then carry on: 7 / 15

Moving on to step 6:
If we divide 7 by 15, we get 0 and a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 12780.0
Subtracting 0 from 7 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 7:
The number 15 fits into 70 4 times, leaving a remainder of 10.
The next digit of our result is 4. 
Result so far: 12780.4
If we subtract 60 from 70, 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.

Moving on to step 8:
100 divided by 15 is 6 with a remainder of 10.
The next digit of our result is 6. 
Result so far: 12780.46
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.

Let's proceed to step 9:
The number 15 fits into 100 6 times, leaving a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 12780.466
If we take 90 away from 100, we end up 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.

After the division, we end up with 12780.466 and a remainder of 0.001.