We divide 909086 by 15
The aim is to understand the frequency of 15 in 909086.

On to step 1:
The number 15 fits into 9 0 times, leaving a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 15

Moving on to step 2:
15 goes into 90 6 times with a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
Deduct 90 from 90 and we're left with 0.
Append the next digit (9) from the dividend to 0 and continue with: 9 / 15

Going ahead to step 3:
The number 15 fits into 9 0 times, leaving a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 60.0
The remainder is 9 after subtracting 0 from 9.
Fetch the next digit (0) from the dividend, attach it to 9 and continue: 90 / 15

Moving on to step 4:
If we divide 90 by 15, we get 6 and a remainder of 0.
Record the quotient 6 as the next digit in the result. 
Result so far: 606.0
If we subtract 90 from 90, we get 0.
Include the next digit (8) from the dividend after 0, then repeat: 8 / 15

Going ahead to step 5:
15 can be fit into 8 0 times, resulting in a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 6060.0
Subtract 0 from 8 to get 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 15

Going ahead to step 6:
86 divided by 15 is 5 with a remainder of 11.
The number 5 becomes the next digit in our result. 
Result so far: 60605.0
Subtract 75 from 86 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.

Moving on to step 7:
110 divided by 15 is 7 with a remainder of 5.
Use 7 as the next digit of our solution. 
Result so far: 60605.7
The remainder is 5 after subtracting 105 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 8:
15 can be fit into 50 3 times, resulting in a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 60605.73
The remainder is 5 after subtracting 45 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 9:
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: 60605.733
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.

The final outcome is 60605.733, with a leftover of 0.0005.