We divide 518739 by 15
The aim is to understand the frequency of 15 in 518739.

On to step 1:
The number 15 fits into 5 0 times, leaving a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 15

Moving on to step 2:
15 goes into 51 3 times with a remainder of 6.
The next digit of our result is 3. 
Result so far: 3.0
Subtract 45 from 51 to get 6.
Grab the next digit (8) from the dividend, add it to 6, then carry on: 68 / 15

Step 3:
68 divided by 15 is 4 with a remainder of 8.
The next digit of our result is 4. 
Result so far: 34.0
The remainder is 8 after subtracting 60 from 68.
Include the next digit (7) from the dividend after 8, then repeat: 87 / 15

Going ahead to step 4:
The number 15 fits into 87 5 times, leaving a remainder of 12.
Put 5 as the next digit of the answer. 
Result so far: 345.0
If we take 75 away from 87, we end up with 12.
Take the next digit (3) from the dividend and append it to 12, then repeat: 123 / 15

Going ahead to step 5:
15 can be fit into 123 8 times, resulting in a remainder of 3.
Put 8 as the next digit of the answer. 
Result so far: 3458.0
The remainder is 3 after subtracting 120 from 123.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 15

On to step 6:
The number 15 fits into 39 2 times, leaving a remainder of 9.
Record the quotient 2 as the next digit in the result. 
Result so far: 34582.0
If we take 30 away from 39, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 7:
90 divided by 15 is 6 with a remainder of 0.
Write down 6 as next digit of the result. 
Result so far: 34582.6
If we take 90 away from 90, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 8:
0 divided by 15 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 34582.6
If we take 0 away from 0, we end up with 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 9:
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: 34582.6
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 34582.6 and a remainder of 0.0.