We're dividing 248364 by 15 
The aim is to understand the frequency of 15 in 248364.

Step 1:
When dividing 2 by 15, we get 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Bring next digit (4) of the dividend behind the 2 and repeat the process: 24 / 15

Let's proceed to step 2:
If we divide 24 by 15, we get 1 and a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 15 from 24 to get 9.
Take the next digit (8) from the dividend and append it to 9, then repeat: 98 / 15

Let's proceed to step 3:
When dividing 98 by 15, we get 6 with a remainder of 8.
Put 6 as the next digit of the answer. 
Result so far: 16.0
The remainder is 8 after subtracting 90 from 98.
Include the next digit (3) from the dividend after 8, then repeat: 83 / 15

Moving on to step 4:
When dividing 83 by 15, we get 5 with a remainder of 8.
The number 5 becomes the next digit in our result. 
Result so far: 165.0
If we take 75 away from 83, we end up with 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 15

Let's proceed to step 5:
The number 15 fits into 86 5 times, leaving a remainder of 11.
Use 5 as the next digit of our solution. 
Result so far: 1655.0
If we subtract 75 from 86, we get 11.
Append the next digit (4) from the dividend to 11 and continue with: 114 / 15

Advancing to step 6:
114 divided by 15 is 7 with a remainder of 9.
Write down 7 as next digit of the result. 
Result so far: 16557.0
If we take 105 away from 114, 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.

Going ahead to step 7:
If we divide 90 by 15, we get 6 and a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 16557.6
The remainder is 0 after subtracting 90 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

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: 16557.6
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.

On to step 9:
If we divide 0 by 15, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 16557.6
Deduct 0 from 0 and we're left 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.

The final outcome is 16557.6, with a leftover of 0.0.