We divide 125365 by 15
The aim is to understand the frequency of 15 in 125365.

Step 1:
15 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 15

Advancing to step 2:
15 goes into 12 0 times with a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 12 to get 12.
Append the next digit (5) from the dividend to 12 and continue with: 125 / 15

Moving on to step 3:
If we divide 125 by 15, we get 8 and a remainder of 5.
Use 8 as the next digit of our solution. 
Result so far: 8.0
The remainder is 5 after subtracting 120 from 125.
Grab the next digit (3) from the dividend, add it to 5, then carry on: 53 / 15

Advancing to step 4:
15 can be fit into 53 3 times, resulting in a remainder of 8.
Record the quotient 3 as the next digit in the result. 
Result so far: 83.0
The remainder is 8 after subtracting 45 from 53.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 15

Moving on to step 5:
If we divide 86 by 15, we get 5 and a remainder of 11.
Use 5 as the next digit of our solution. 
Result so far: 835.0
The remainder is 11 after subtracting 75 from 86.
Take the next digit (5) from the dividend and append it to 11, then repeat: 115 / 15

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: 8357.0
Deduct 105 from 115 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 7:
15 can be fit into 100 6 times, resulting in a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 8357.6
Subtract 90 from 100 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
15 can be fit into 100 6 times, resulting in a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 8357.66
The remainder is 10 after subtracting 90 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The quotient of the division is 8357.66, and the remainder is 0.01.