553672 ÷ 18 
The aim is to understand the frequency of 18 in 553672.

On to step 1:
If we divide 5 by 18, we get 0 and a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Fetch the next digit (5) from the dividend, attach it to 5 and continue: 55 / 18

Advancing to step 2:
55 divided by 18 is 3 with a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
The remainder is 1 after subtracting 54 from 55.
Append the next digit (3) from the dividend to 1 and continue with: 13 / 18

Advancing to step 3:
If we divide 13 by 18, we get 0 and a remainder of 13.
Put 0 as the next digit of the answer. 
Result so far: 30.0
If we take 0 away from 13, we end up with 13.
Include the next digit (6) from the dividend after 13, then repeat: 136 / 18

Going ahead to step 4:
If we divide 136 by 18, we get 7 and a remainder of 10.
Write down 7 as next digit of the result. 
Result so far: 307.0
The remainder is 10 after subtracting 126 from 136.
Append the next digit (7) from the dividend to 10 and continue with: 107 / 18

On to step 5:
107 divided by 18 is 5 with a remainder of 17.
Use 5 as the next digit of our solution. 
Result so far: 3075.0
If we subtract 90 from 107, we get 17.
Include the next digit (2) from the dividend after 17, then repeat: 172 / 18

Let's proceed to step 6:
If we divide 172 by 18, we get 9 and a remainder of 10.
The number 9 becomes the next digit in our result. 
Result so far: 30759.0
If we subtract 162 from 172, we 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.

Step 7:
18 goes into 100 5 times with a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 30759.5
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.

Let's proceed to step 8:
100 divided by 18 is 5 with a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 30759.55
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.

Our division results in 30759.55 with a remaining 0.01.