We look at the division of 14246520 by 15 
The aim is to understand the frequency of 15 in 14246520.

Let's proceed to step 1:
15 goes into 1 0 times with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (4) of the dividend behind the 1 and repeat the process: 14 / 15

Advancing to step 2:
If we divide 14 by 15, we get 0 and a remainder of 14.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 14, we get 14.
Bring next digit (2) of the dividend behind the 14 and repeat the process: 142 / 15

Let's proceed to step 3:
If we divide 142 by 15, we get 9 and a remainder of 7.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Subtracting 135 from 142 leaves us with 7.
Take the next digit (4) from the dividend and append it to 7, then repeat: 74 / 15

On to step 4:
The number 15 fits into 74 4 times, leaving a remainder of 14.
Put 4 as the next digit of the answer. 
Result so far: 94.0
Deduct 60 from 74 and we're left with 14.
Append the next digit (6) from the dividend to 14 and continue with: 146 / 15

Step 5:
The number 15 fits into 146 9 times, leaving a remainder of 11.
The next digit of our result is 9. 
Result so far: 949.0
Subtracting 135 from 146 leaves us with 11.
Grab the next digit (5) from the dividend, add it to 11, then carry on: 115 / 15

Advancing to step 6:
15 goes into 115 7 times with a remainder of 10.
Use 7 as the next digit of our solution. 
Result so far: 9497.0
If we take 105 away from 115, we end up with 10.
Grab the next digit (2) from the dividend, add it to 10, then carry on: 102 / 15

Let's proceed to step 7:
102 divided by 15 is 6 with a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 94976.0
If we subtract 90 from 102, we get 12.
Bring next digit (0) of the dividend behind the 12 and repeat the process: 120 / 15

Moving on to step 8:
When dividing 120 by 15, we get 8 with a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 949768.0
Subtract 120 from 120 to 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.

Moving on to step 9:
0 divided by 15 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 949768.0
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 10:
If we divide 0 by 15, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 949768.0
Subtract 0 from 0 to 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.

After the division, we end up with 949768.0 and a remainder of 0.0.