We're dividing 920488 by 18 
The aim is to understand the frequency of 18 in 920488.

Step 1:
18 goes into 9 0 times with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Include the next digit (2) from the dividend after 9, then repeat: 92 / 18

Let's proceed to step 2:
The number 18 fits into 92 5 times, leaving a remainder of 2.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
If we take 90 away from 92, we end up with 2.
Take the next digit (0) from the dividend and append it to 2, then repeat: 20 / 18

On to step 3:
20 divided by 18 is 1 with a remainder of 2.
The number 1 becomes the next digit in our result. 
Result so far: 51.0
The remainder is 2 after subtracting 18 from 20.
Append the next digit (4) from the dividend to 2 and continue with: 24 / 18

On to step 4:
The number 18 fits into 24 1 times, leaving a remainder of 6.
Write down 1 as next digit of the result. 
Result so far: 511.0
Subtracting 18 from 24 leaves us with 6.
Bring next digit (8) of the dividend behind the 6 and repeat the process: 68 / 18

Moving on to step 5:
If we divide 68 by 18, we get 3 and a remainder of 14.
Write down 3 as next digit of the result. 
Result so far: 5113.0
If we take 54 away from 68, we end up with 14.
Fetch the next digit (8) from the dividend, attach it to 14 and continue: 148 / 18

Step 6:
18 can be fit into 148 8 times, resulting in a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 51138.0
Subtract 144 from 148 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.

Advancing to step 7:
18 goes into 40 2 times with a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 51138.2
Deduct 36 from 40 and we're left 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 8:
18 goes into 40 2 times with a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 51138.22
Deduct 36 from 40 and we're left 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 outcome is 51138.22, with a leftover of 0.004.