Let's divide 536120 by 15
The aim is to understand the frequency of 15 in 536120.

On to step 1:
15 can be fit into 5 0 times, resulting in a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 15

Going ahead to step 2:
15 goes into 53 3 times with a remainder of 8.
Write down 3 as next digit of the result. 
Result so far: 3.0
Deduct 45 from 53 and we're left with 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 15

Let's proceed to step 3:
The number 15 fits into 86 5 times, leaving a remainder of 11.
Record the quotient 5 as the next digit in the result. 
Result so far: 35.0
The remainder is 11 after subtracting 75 from 86.
Bring next digit (1) of the dividend behind the 11 and repeat the process: 111 / 15

On to step 4:
If we divide 111 by 15, we get 7 and a remainder of 6.
Write down 7 as next digit of the result. 
Result so far: 357.0
Deduct 105 from 111 and we're left with 6.
Grab the next digit (2) from the dividend, add it to 6, then carry on: 62 / 15

Advancing to step 5:
15 goes into 62 4 times with a remainder of 2.
The number 4 becomes the next digit in our result. 
Result so far: 3574.0
Subtracting 60 from 62 leaves us with 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 15

On to step 6:
If we divide 20 by 15, we get 1 and a remainder of 5.
Put 1 as the next digit of the answer. 
Result so far: 35741.0
The remainder is 5 after subtracting 15 from 20.
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 7:
50 divided by 15 is 3 with a remainder of 5.
The next digit of our result is 3. 
Result so far: 35741.3
If we take 45 away from 50, 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.

Let's proceed to step 8:
When dividing 50 by 15, we get 3 with a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 35741.33
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 quotient of the division is 35741.33, and the remainder is 0.005.