We look at the division of 804471 by 15 
The aim is to understand the frequency of 15 in 804471.

Let's proceed to step 1:
The number 15 fits into 8 0 times, leaving a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Bring next digit (0) of the dividend behind the 8 and repeat the process: 80 / 15

Let's proceed to step 2:
If we divide 80 by 15, we get 5 and a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
Subtracting 75 from 80 leaves us with 5.
Bring next digit (4) of the dividend behind the 5 and repeat the process: 54 / 15

Going ahead to step 3:
If we divide 54 by 15, we get 3 and a remainder of 9.
Put 3 as the next digit of the answer. 
Result so far: 53.0
If we take 45 away from 54, we end up with 9.
Bring next digit (4) of the dividend behind the 9 and repeat the process: 94 / 15

On to step 4:
If we divide 94 by 15, we get 6 and a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 536.0
If we subtract 90 from 94, we get 4.
Include the next digit (7) from the dividend after 4, then repeat: 47 / 15

Going ahead to step 5:
If we divide 47 by 15, we get 3 and a remainder of 2.
The number 3 becomes the next digit in our result. 
Result so far: 5363.0
Subtracting 45 from 47 leaves us with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 15

Going ahead to step 6:
21 divided by 15 is 1 with a remainder of 6.
Record the quotient 1 as the next digit in the result. 
Result so far: 53631.0
If we take 15 away from 21, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 7:
15 can be fit into 60 4 times, resulting in a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 53631.4
If we subtract 60 from 60, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 8:
15 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 53631.4
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
If we divide 0 by 15, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 53631.4
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 53631.4 with a remainder of 0.0.