We're dividing 938171 by 15 
The aim is to understand the frequency of 15 in 938171.

Going ahead to step 1:
9 divided by 15 is 0 with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Take the next digit (3) from the dividend and append it to 9, then repeat: 93 / 15

Moving on to step 2:
The number 15 fits into 93 6 times, leaving a remainder of 3.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Subtracting 90 from 93 leaves us with 3.
Include the next digit (8) from the dividend after 3, then repeat: 38 / 15

Moving on to step 3:
If we divide 38 by 15, we get 2 and a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 62.0
The remainder is 8 after subtracting 30 from 38.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 15

Moving on to step 4:
If we divide 81 by 15, we get 5 and a remainder of 6.
The number 5 becomes the next digit in our result. 
Result so far: 625.0
Deduct 75 from 81 and we're left with 6.
Fetch the next digit (7) from the dividend, attach it to 6 and continue: 67 / 15

Going ahead to step 5:
When dividing 67 by 15, we get 4 with a remainder of 7.
The number 4 becomes the next digit in our result. 
Result so far: 6254.0
If we take 60 away from 67, we end up with 7.
Take the next digit (1) from the dividend and append it to 7, then repeat: 71 / 15

Moving on to step 6:
The number 15 fits into 71 4 times, leaving a remainder of 11.
Use 4 as the next digit of our solution. 
Result so far: 62544.0
Subtract 60 from 71 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 7:
When dividing 110 by 15, we get 7 with a remainder of 5.
Write down 7 as next digit of the result. 
Result so far: 62544.7
If we subtract 105 from 110, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 8:
When dividing 50 by 15, we get 3 with a remainder of 5.
Record the quotient 3 as the next digit in the result. 
Result so far: 62544.73
If we subtract 45 from 50, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 9:
The number 15 fits into 50 3 times, leaving a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 62544.733
Subtracting 45 from 50 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

After the division, we end up with 62544.733 and a remainder of 0.0005.