We look at the division of 883090 by 15 
The aim is to understand the frequency of 15 in 883090.

Step 1:
If we divide 8 by 15, we get 0 and a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Include the next digit (8) from the dividend after 8, then repeat: 88 / 15

Going ahead to step 2:
When dividing 88 by 15, we get 5 with a remainder of 13.
Put 5 as the next digit of the answer. 
Result so far: 5.0
If we subtract 75 from 88, we get 13.
Take the next digit (3) from the dividend and append it to 13, then repeat: 133 / 15

Let's proceed to step 3:
When dividing 133 by 15, we get 8 with a remainder of 13.
Write down 8 as next digit of the result. 
Result so far: 58.0
If we subtract 120 from 133, we get 13.
Bring next digit (0) of the dividend behind the 13 and repeat the process: 130 / 15

Advancing to step 4:
The number 15 fits into 130 8 times, leaving a remainder of 10.
Use 8 as the next digit of our solution. 
Result so far: 588.0
Deduct 120 from 130 and we're left with 10.
Include the next digit (9) from the dividend after 10, then repeat: 109 / 15

Let's proceed to step 5:
15 goes into 109 7 times with a remainder of 4.
The next digit of our result is 7. 
Result so far: 5887.0
Deduct 105 from 109 and we're left with 4.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 15

Step 6:
When dividing 40 by 15, we get 2 with a remainder of 10.
The next digit of our result is 2. 
Result so far: 58872.0
The remainder is 10 after subtracting 30 from 40.
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 7:
If we divide 100 by 15, we get 6 and a remainder of 10.
Put 6 as the next digit of the answer. 
Result so far: 58872.6
Deduct 90 from 100 and we're left 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.

Going ahead to step 8:
If we divide 100 by 15, we get 6 and a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 58872.66
The remainder is 10 after subtracting 90 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Our division results in 58872.66 with a remaining 0.01.