518030 ÷ 15 
The aim is to understand the frequency of 15 in 518030.

Moving on to step 1:
If we divide 5 by 15, we get 0 and a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 15

Step 2:
15 can be fit into 51 3 times, resulting in a remainder of 6.
The next digit of our result is 3. 
Result so far: 3.0
Deduct 45 from 51 and we're left with 6.
Fetch the next digit (8) from the dividend, attach it to 6 and continue: 68 / 15

Advancing to step 3:
The number 15 fits into 68 4 times, leaving 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.
Fetch the next digit (0) from the dividend, attach it to 8 and continue: 80 / 15

Going ahead to step 4:
15 can be fit into 80 5 times, resulting in a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 345.0
If we subtract 75 from 80, we get 5.
Fetch the next digit (3) from the dividend, attach it to 5 and continue: 53 / 15

Step 5:
If we divide 53 by 15, we get 3 and a remainder of 8.
Write down 3 as next digit of the result. 
Result so far: 3453.0
If we take 45 away from 53, we end up with 8.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 15

Let's proceed to step 6:
If we divide 80 by 15, we get 5 and a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 34535.0
The remainder is 5 after subtracting 75 from 80.
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 7:
The number 15 fits into 50 3 times, leaving a remainder of 5.
Write down 3 as next digit of the result. 
Result so far: 34535.3
Deduct 45 from 50 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 8:
If we divide 50 by 15, we get 3 and a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 34535.33
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 34535.33, with a leftover of 0.005.