Let's divide 489039 by 18
The aim is to understand the frequency of 18 in 489039.

Advancing to step 1:
When dividing 4 by 18, we get 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Include the next digit (8) from the dividend after 4, then repeat: 48 / 18

Advancing to step 2:
48 divided by 18 is 2 with a remainder of 12.
Put 2 as the next digit of the answer. 
Result so far: 2.0
The remainder is 12 after subtracting 36 from 48.
Include the next digit (9) from the dividend after 12, then repeat: 129 / 18

Advancing to step 3:
When dividing 129 by 18, we get 7 with a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 27.0
Deduct 126 from 129 and we're left with 3.
Take the next digit (0) from the dividend and append it to 3, then repeat: 30 / 18

Step 4:
The number 18 fits into 30 1 times, leaving a remainder of 12.
Use 1 as the next digit of our solution. 
Result so far: 271.0
If we subtract 18 from 30, we get 12.
Fetch the next digit (3) from the dividend, attach it to 12 and continue: 123 / 18

Moving on to step 5:
The number 18 fits into 123 6 times, leaving a remainder of 15.
The number 6 becomes the next digit in our result. 
Result so far: 2716.0
Subtract 108 from 123 to get 15.
Take the next digit (9) from the dividend and append it to 15, then repeat: 159 / 18

On to step 6:
159 divided by 18 is 8 with a remainder of 15.
Put 8 as the next digit of the answer. 
Result so far: 27168.0
Subtract 144 from 159 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 7:
The number 18 fits into 150 8 times, leaving a remainder of 6.
Write down 8 as next digit of the result. 
Result so far: 27168.8
Deduct 144 from 150 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 8:
If we divide 60 by 18, we get 3 and a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 27168.83
Subtracting 54 from 60 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 9:
The number 18 fits into 60 3 times, leaving a remainder of 6.
The next digit of our result is 3. 
Result so far: 27168.833
Subtracting 54 from 60 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The quotient of the division is 27168.833, and the remainder is 0.0006.