We look at the division of 505064 by 15 
The aim is to understand the frequency of 15 in 505064.

Let's proceed to step 1:
5 divided by 15 is 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Take the next digit (0) from the dividend and append it to 5, then repeat: 50 / 15

On to step 2:
15 goes into 50 3 times with a remainder of 5.
Write down 3 as next digit of the result. 
Result so far: 3.0
Deduct 45 from 50 and we're left with 5.
Bring next digit (5) of the dividend behind the 5 and repeat the process: 55 / 15

Going ahead to step 3:
55 divided by 15 is 3 with a remainder of 10.
The next digit of our result is 3. 
Result so far: 33.0
Subtract 45 from 55 to get 10.
Bring next digit (0) of the dividend behind the 10 and repeat the process: 100 / 15

On to step 4:
15 goes into 100 6 times with a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 336.0
The remainder is 10 after subtracting 90 from 100.
Take the next digit (6) from the dividend and append it to 10, then repeat: 106 / 15

Moving on to step 5:
15 goes into 106 7 times with a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 3367.0
Deduct 105 from 106 and we're left with 1.
Fetch the next digit (4) from the dividend, attach it to 1 and continue: 14 / 15

Moving on to step 6:
15 goes into 14 0 times with a remainder of 14.
Use 0 as the next digit of our solution. 
Result so far: 33670.0
The remainder is 14 after subtracting 0 from 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 7:
15 goes into 140 9 times with a remainder of 5.
Use 9 as the next digit of our solution. 
Result so far: 33670.9
Subtract 135 from 140 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 8:
50 divided by 15 is 3 with a remainder of 5.
The next digit of our result is 3. 
Result so far: 33670.93
Subtract 45 from 50 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 9:
If we divide 50 by 15, we get 3 and a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 33670.933
The remainder is 5 after subtracting 45 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The final outcome is 33670.933, with a leftover of 0.0005.