493664 divided by 18 
The aim is to understand the frequency of 18 in 493664.

Moving on to step 1:
4 divided by 18 is 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Include the next digit (9) from the dividend after 4, then repeat: 49 / 18

Let's proceed to step 2:
49 divided by 18 is 2 with a remainder of 13.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 36 from 49 and we're left with 13.
Append the next digit (3) from the dividend to 13 and continue with: 133 / 18

Let's proceed to step 3:
18 can be fit into 133 7 times, resulting in a remainder of 7.
Record the quotient 7 as the next digit in the result. 
Result so far: 27.0
Deduct 126 from 133 and we're left with 7.
Fetch the next digit (6) from the dividend, attach it to 7 and continue: 76 / 18

Going ahead to step 4:
When dividing 76 by 18, we get 4 with a remainder of 4.
Write down 4 as next digit of the result. 
Result so far: 274.0
Subtracting 72 from 76 leaves us with 4.
Take the next digit (6) from the dividend and append it to 4, then repeat: 46 / 18

On to step 5:
18 goes into 46 2 times with a remainder of 10.
The next digit of our result is 2. 
Result so far: 2742.0
Subtracting 36 from 46 leaves us with 10.
Include the next digit (4) from the dividend after 10, then repeat: 104 / 18

Going ahead to step 6:
When dividing 104 by 18, we get 5 with a remainder of 14.
The next digit of our result is 5. 
Result so far: 27425.0
Deduct 90 from 104 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 7:
18 goes into 140 7 times with a remainder of 14.
The number 7 becomes the next digit in our result. 
Result so far: 27425.7
Subtracting 126 from 140 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 8:
When dividing 140 by 18, we get 7 with a remainder of 14.
The next digit of our result is 7. 
Result so far: 27425.77
If we take 126 away from 140, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

After the division, we end up with 27425.77 and a remainder of 0.014.