272872 ÷ 18 
The aim is to understand the frequency of 18 in 272872.

On to step 1:
2 divided by 18 is 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (7) from the dividend, attach it to 2 and continue: 27 / 18

On to step 2:
27 divided by 18 is 1 with a remainder of 9.
The next digit of our result is 1. 
Result so far: 1.0
If we take 18 away from 27, we end up with 9.
Include the next digit (2) from the dividend after 9, then repeat: 92 / 18

Advancing to step 3:
18 goes into 92 5 times with a remainder of 2.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
If we take 90 away from 92, we end up with 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 18

Moving on to step 4:
28 divided by 18 is 1 with a remainder of 10.
The next digit of our result is 1. 
Result so far: 151.0
Deduct 18 from 28 and we're left with 10.
Take the next digit (7) from the dividend and append it to 10, then repeat: 107 / 18

Going ahead to step 5:
107 divided by 18 is 5 with a remainder of 17.
Record the quotient 5 as the next digit in the result. 
Result so far: 1515.0
If we take 90 away from 107, we end up with 17.
Take the next digit (2) from the dividend and append it to 17, then repeat: 172 / 18

Let's proceed to step 6:
172 divided by 18 is 9 with a remainder of 10.
Write down 9 as next digit of the result. 
Result so far: 15159.0
The remainder is 10 after subtracting 162 from 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 7:
100 divided by 18 is 5 with a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 15159.5
Deduct 90 from 100 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.

Advancing to step 8:
100 divided by 18 is 5 with a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 15159.55
Subtracting 90 from 100 leaves us 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.

The final result is 15159.55 with a remainder of 0.01.