665071 ÷ 15 
The aim is to understand the frequency of 15 in 665071.

Going ahead to step 1:
15 can be fit into 6 0 times, resulting in a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 15

Let's proceed to step 2:
15 goes into 66 4 times with a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
The remainder is 6 after subtracting 60 from 66.
Append the next digit (5) from the dividend to 6 and continue with: 65 / 15

On to step 3:
15 can be fit into 65 4 times, resulting in a remainder of 5.
Use 4 as the next digit of our solution. 
Result so far: 44.0
If we subtract 60 from 65, we get 5.
Include the next digit (0) from the dividend after 5, then repeat: 50 / 15

Moving on to step 4:
15 goes into 50 3 times with a remainder of 5.
Record the quotient 3 as the next digit in the result. 
Result so far: 443.0
Subtract 45 from 50 to get 5.
Append the next digit (7) from the dividend to 5 and continue with: 57 / 15

Moving on to step 5:
15 goes into 57 3 times with a remainder of 12.
Record the quotient 3 as the next digit in the result. 
Result so far: 4433.0
If we subtract 45 from 57, we get 12.
Bring next digit (1) of the dividend behind the 12 and repeat the process: 121 / 15

Moving on to step 6:
121 divided by 15 is 8 with a remainder of 1.
Put 8 as the next digit of the answer. 
Result so far: 44338.0
Subtracting 120 from 121 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 7:
15 goes into 10 0 times with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 44338.0
If we take 0 away from 10, we end up 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.

Advancing to step 8:
15 can be fit into 100 6 times, resulting in a remainder of 10.
Put 6 as the next digit of the answer. 
Result so far: 44338.06
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.

Going ahead to step 9:
If we divide 100 by 15, we get 6 and a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 44338.066
If we take 90 away from 100, we end up 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.

The final result is 44338.066 with a remainder of 0.001.