We look at the division of 677252 by 15 
The aim is to understand the frequency of 15 in 677252.

On to step 1:
6 divided by 15 is 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Grab the next digit (7) from the dividend, add it to 6, then carry on: 67 / 15

Moving on to step 2:
15 can be fit into 67 4 times, resulting in a remainder of 7.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtracting 60 from 67 leaves us with 7.
Bring next digit (7) of the dividend behind the 7 and repeat the process: 77 / 15

On to step 3:
The number 15 fits into 77 5 times, leaving a remainder of 2.
The next digit of our result is 5. 
Result so far: 45.0
If we subtract 75 from 77, we get 2.
Grab the next digit (2) from the dividend, add it to 2, then carry on: 22 / 15

On to step 4:
15 goes into 22 1 times with a remainder of 7.
Record the quotient 1 as the next digit in the result. 
Result so far: 451.0
Deduct 15 from 22 and we're left with 7.
Take the next digit (5) from the dividend and append it to 7, then repeat: 75 / 15

Let's proceed to step 5:
When dividing 75 by 15, we get 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 4515.0
Subtracting 75 from 75 leaves us with 0.
Bring next digit (2) of the dividend behind the 0 and repeat the process: 2 / 15

Moving on to step 6:
15 goes into 2 0 times with a remainder of 2.
The next digit of our result is 0. 
Result so far: 45150.0
The remainder is 2 after subtracting 0 from 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 7:
The number 15 fits into 20 1 times, leaving a remainder of 5.
The next digit of our result is 1. 
Result so far: 45150.1
If we take 15 away from 20, we end up 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.

Advancing to step 8:
The number 15 fits into 50 3 times, leaving a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 45150.13
If we subtract 45 from 50, we 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.
Record the quotient 3 as the next digit in the result. 
Result so far: 45150.133
If we subtract 45 from 50, we 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.

The final result is 45150.133 with a remainder of 0.0005.