543854 ÷ 18 
The aim is to understand the frequency of 18 in 543854.

Let's proceed to step 1:
When dividing 5 by 18, we get 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Fetch the next digit (4) from the dividend, attach it to 5 and continue: 54 / 18

Moving on to step 2:
54 divided by 18 is 3 with a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Deduct 54 from 54 and we're left with 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 18

Going ahead to step 3:
When dividing 3 by 18, we get 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 30.0
Deduct 0 from 3 and we're left with 3.
Fetch the next digit (8) from the dividend, attach it to 3 and continue: 38 / 18

Moving on to step 4:
If we divide 38 by 18, we get 2 and a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 302.0
Subtract 36 from 38 to get 2.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 18

Going ahead to step 5:
When dividing 25 by 18, we get 1 with a remainder of 7.
Write down 1 as next digit of the result. 
Result so far: 3021.0
Subtracting 18 from 25 leaves us with 7.
Include the next digit (4) from the dividend after 7, then repeat: 74 / 18

Let's proceed to step 6:
When dividing 74 by 18, we get 4 with a remainder of 2.
The number 4 becomes the next digit in our result. 
Result so far: 30214.0
Subtracting 72 from 74 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 7:
18 can be fit into 20 1 times, resulting in a remainder of 2.
The next digit of our result is 1. 
Result so far: 30214.1
Deduct 18 from 20 and we're left with 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 8:
When dividing 20 by 18, we get 1 with a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 30214.11
If we take 18 away from 20, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The quotient of the division is 30214.11, and the remainder is 0.002.