We look at the division of 982091 by 15 
The aim is to understand the frequency of 15 in 982091.

Going ahead to step 1:
15 goes into 9 0 times 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.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 15

Going ahead to step 2:
If we divide 98 by 15, we get 6 and a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Subtract 90 from 98 to get 8.
Take the next digit (2) from the dividend and append it to 8, then repeat: 82 / 15

Going ahead to step 3:
When dividing 82 by 15, we get 5 with a remainder of 7.
Put 5 as the next digit of the answer. 
Result so far: 65.0
Deduct 75 from 82 and we're left with 7.
Bring next digit (0) of the dividend behind the 7 and repeat the process: 70 / 15

Advancing to step 4:
If we divide 70 by 15, we get 4 and a remainder of 10.
Put 4 as the next digit of the answer. 
Result so far: 654.0
Subtract 60 from 70 to get 10.
Take the next digit (9) from the dividend and append it to 10, then repeat: 109 / 15

Advancing to step 5:
109 divided by 15 is 7 with a remainder of 4.
The next digit of our result is 7. 
Result so far: 6547.0
Deduct 105 from 109 and we're left with 4.
Bring next digit (1) of the dividend behind the 4 and repeat the process: 41 / 15

Going ahead to step 6:
15 can be fit into 41 2 times, resulting in a remainder of 11.
Use 2 as the next digit of our solution. 
Result so far: 65472.0
The remainder is 11 after subtracting 30 from 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 7:
15 goes into 110 7 times with a remainder of 5.
Use 7 as the next digit of our solution. 
Result so far: 65472.7
Deduct 105 from 110 and we're left 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.

Let's proceed to step 8:
50 divided by 15 is 3 with a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 65472.73
Deduct 45 from 50 and we're left 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.

Moving on to step 9:
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: 65472.733
Deduct 45 from 50 and we're left 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.

Our division results in 65472.733 with a remaining 0.0005.