939186 divided by 15 
The aim is to understand the frequency of 15 in 939186.

Let's proceed to step 1:
When dividing 9 by 15, we get 0 with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Append the next digit (3) from the dividend to 9 and continue with: 93 / 15

On to step 2:
93 divided by 15 is 6 with a remainder of 3.
Write down 6 as next digit of the result. 
Result so far: 6.0
The remainder is 3 after subtracting 90 from 93.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 15

Step 3:
15 can be fit into 39 2 times, resulting in a remainder of 9.
The next digit of our result is 2. 
Result so far: 62.0
If we take 30 away from 39, we end up with 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 15

Advancing to step 4:
91 divided by 15 is 6 with a remainder of 1.
The next digit of our result is 6. 
Result so far: 626.0
The remainder is 1 after subtracting 90 from 91.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 15

Step 5:
If we divide 18 by 15, we get 1 and a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 6261.0
If we subtract 15 from 18, we get 3.
Fetch the next digit (6) from the dividend, attach it to 3 and continue: 36 / 15

Going ahead to step 6:
36 divided by 15 is 2 with a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 62612.0
Subtracting 30 from 36 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 7:
The number 15 fits into 60 4 times, leaving a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 62612.4
If we subtract 60 from 60, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
15 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 62612.4
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 9:
15 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 62612.4
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 62612.4 and a remainder of 0.0.