939169 ÷ 15 
The aim is to understand the frequency of 15 in 939169.

Advancing to step 1:
When dividing 9 by 15, we get 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Append the next digit (3) from the dividend to 9 and continue with: 93 / 15

Let's proceed to step 2:
The number 15 fits into 93 6 times, leaving a remainder of 3.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
If we subtract 90 from 93, we get 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 15

Step 3:
15 can be fit into 39 2 times, resulting in a remainder of 9.
Write down 2 as next digit of the result. 
Result so far: 62.0
If we take 30 away from 39, we end up with 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 15

On to step 4:
When dividing 91 by 15, we get 6 with a remainder of 1.
Write down 6 as next digit of the result. 
Result so far: 626.0
Subtract 90 from 91 to get 1.
Grab the next digit (6) from the dividend, add it to 1, then carry on: 16 / 15

Moving on to step 5:
When dividing 16 by 15, we get 1 with a remainder of 1.
The next digit of our result is 1. 
Result so far: 6261.0
The remainder is 1 after subtracting 15 from 16.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 15

Moving on to step 6:
If we divide 19 by 15, we get 1 and a remainder of 4.
Use 1 as the next digit of our solution. 
Result so far: 62611.0
Subtracting 15 from 19 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 7:
15 can be fit into 40 2 times, resulting in a remainder of 10.
Put 2 as the next digit of the answer. 
Result so far: 62611.2
If we subtract 30 from 40, 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 8:
15 goes into 100 6 times with a remainder of 10.
Record the quotient 6 as the next digit in the result. 
Result so far: 62611.26
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.

Advancing to step 9:
15 can be fit into 100 6 times, resulting in a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 62611.266
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 final result is 62611.266 with a remainder of 0.001.