725127 divided by 15 
The aim is to understand the frequency of 15 in 725127.

Advancing to step 1:
7 divided by 15 is 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Include the next digit (2) from the dividend after 7, then repeat: 72 / 15

Advancing to step 2:
15 can be fit into 72 4 times, resulting in a remainder of 12.
The next digit of our result is 4. 
Result so far: 4.0
Subtracting 60 from 72 leaves us with 12.
Include the next digit (5) from the dividend after 12, then repeat: 125 / 15

Moving on to step 3:
If we divide 125 by 15, we get 8 and a remainder of 5.
Put 8 as the next digit of the answer. 
Result so far: 48.0
If we take 120 away from 125, we end up with 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 15

Advancing to step 4:
If we divide 51 by 15, we get 3 and a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 483.0
Deduct 45 from 51 and we're left with 6.
Fetch the next digit (2) from the dividend, attach it to 6 and continue: 62 / 15

Moving on to step 5:
15 goes into 62 4 times with a remainder of 2.
Put 4 as the next digit of the answer. 
Result so far: 4834.0
Subtract 60 from 62 to get 2.
Grab the next digit (7) from the dividend, add it to 2, then carry on: 27 / 15

Advancing to step 6:
15 goes into 27 1 times with a remainder of 12.
Put 1 as the next digit of the answer. 
Result so far: 48341.0
Subtracting 15 from 27 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 7:
120 divided by 15 is 8 with a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 48341.8
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.

On to step 8:
When dividing 0 by 15, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 48341.8
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.

Let's proceed to step 9:
0 divided by 15 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 48341.8
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 result is 48341.8 with a remainder of 0.0.