We look at the division of 668065 by 18 
The aim is to understand the frequency of 18 in 668065.

Step 1:
6 divided by 18 is 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 18

Step 2:
18 goes into 66 3 times with a remainder of 12.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtract 54 from 66 to get 12.
Append the next digit (8) from the dividend to 12 and continue with: 128 / 18

Step 3:
The number 18 fits into 128 7 times, leaving a remainder of 2.
Record the quotient 7 as the next digit in the result. 
Result so far: 37.0
Subtract 126 from 128 to get 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 18

Step 4:
18 can be fit into 20 1 times, resulting in a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 371.0
The remainder is 2 after subtracting 18 from 20.
Take the next digit (6) from the dividend and append it to 2, then repeat: 26 / 18

On to step 5:
The number 18 fits into 26 1 times, leaving a remainder of 8.
Use 1 as the next digit of our solution. 
Result so far: 3711.0
If we take 18 away from 26, we end up with 8.
Take the next digit (5) from the dividend and append it to 8, then repeat: 85 / 18

Step 6:
18 goes into 85 4 times with a remainder of 13.
Use 4 as the next digit of our solution. 
Result so far: 37114.0
If we take 72 away from 85, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 7:
130 divided by 18 is 7 with a remainder of 4.
Use 7 as the next digit of our solution. 
Result so far: 37114.7
Deduct 126 from 130 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.

Moving on to step 8:
18 goes into 40 2 times with a remainder of 4.
The next digit of our result is 2. 
Result so far: 37114.72
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.

Step 9:
18 goes into 40 2 times with a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 37114.722
If we subtract 36 from 40, we 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.

In conclusion, the division gives 37114.722 with a balance of 0.0004.