Let's divide 985783 by 15
The aim is to understand the frequency of 15 in 985783.

Moving on 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
Deduct 0 from 9 and we're left with 9.
Include the next digit (8) from the dividend after 9, then repeat: 98 / 15

Let's proceed to step 2:
98 divided by 15 is 6 with a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
Deduct 90 from 98 and we're left with 8.
Append the next digit (5) from the dividend to 8 and continue with: 85 / 15

Moving on to step 3:
If we divide 85 by 15, we get 5 and a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 65.0
Subtracting 75 from 85 leaves us with 10.
Take the next digit (7) from the dividend and append it to 10, then repeat: 107 / 15

Let's proceed to step 4:
When dividing 107 by 15, we get 7 with a remainder of 2.
The next digit of our result is 7. 
Result so far: 657.0
If we take 105 away from 107, we end up with 2.
Take the next digit (8) from the dividend and append it to 2, then repeat: 28 / 15

On to step 5:
When dividing 28 by 15, we get 1 with a remainder of 13.
The next digit of our result is 1. 
Result so far: 6571.0
Subtracting 15 from 28 leaves us with 13.
Append the next digit (3) from the dividend to 13 and continue with: 133 / 15

Moving on to step 6:
If we divide 133 by 15, we get 8 and a remainder of 13.
Put 8 as the next digit of the answer. 
Result so far: 65718.0
The remainder is 13 after subtracting 120 from 133.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 7:
15 goes into 130 8 times with a remainder of 10.
Record the quotient 8 as the next digit in the result. 
Result so far: 65718.8
If we subtract 120 from 130, 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.

Moving on to step 8:
When dividing 100 by 15, we get 6 with a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 65718.86
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 goes into 100 6 times with a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 65718.866
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.

After the division, we end up with 65718.866 and a remainder of 0.001.