We divide 88573 by 18
The aim is to understand the frequency of 18 in 88573.

On to step 1:
8 divided by 18 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (8) from the dividend, attach it to 8 and continue: 88 / 18

Let's proceed to step 2:
If we divide 88 by 18, we get 4 and a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Deduct 72 from 88 and we're left with 16.
Include the next digit (5) from the dividend after 16, then repeat: 165 / 18

Step 3:
The number 18 fits into 165 9 times, leaving a remainder of 3.
Record the quotient 9 as the next digit in the result. 
Result so far: 49.0
Subtracting 162 from 165 leaves us with 3.
Grab the next digit (7) from the dividend, add it to 3, then carry on: 37 / 18

Advancing to step 4:
18 goes into 37 2 times with a remainder of 1.
Record the quotient 2 as the next digit in the result. 
Result so far: 492.0
Subtract 36 from 37 to get 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 18

Step 5:
When dividing 13 by 18, we get 0 with a remainder of 13.
The next digit of our result is 0. 
Result so far: 4920.0
If we subtract 0 from 13, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 6:
When dividing 130 by 18, we get 7 with a remainder of 4.
Record the quotient 7 as the next digit in the result. 
Result so far: 4920.7
Subtracting 126 from 130 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 7:
18 can be fit into 40 2 times, resulting in a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 4920.72
Subtract 36 from 40 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 8:
18 goes into 40 2 times with a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 4920.722
If we take 36 away from 40, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final result is 4920.722 with a remainder of 0.0004.