Let's divide 552066 by 18
The aim is to understand the frequency of 18 in 552066.

Advancing to step 1:
18 can be fit into 5 0 times, resulting in a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Grab the next digit (5) from the dividend, add it to 5, then carry on: 55 / 18

On to step 2:
55 divided by 18 is 3 with a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtract 54 from 55 to get 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 18

On to step 3:
The number 18 fits into 12 0 times, leaving a remainder of 12.
The number 0 becomes the next digit in our result. 
Result so far: 30.0
Subtracting 0 from 12 leaves us with 12.
Include the next digit (0) from the dividend after 12, then repeat: 120 / 18

On to step 4:
The number 18 fits into 120 6 times, leaving a remainder of 12.
The next digit of our result is 6. 
Result so far: 306.0
Subtract 108 from 120 to get 12.
Grab the next digit (6) from the dividend, add it to 12, then carry on: 126 / 18

Let's proceed to step 5:
The number 18 fits into 126 7 times, leaving a remainder of 0.
The number 7 becomes the next digit in our result. 
Result so far: 3067.0
If we subtract 126 from 126, we get 0.
Grab the next digit (6) from the dividend, add it to 0, then carry on: 6 / 18

On to step 6:
If we divide 6 by 18, we get 0 and a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 30670.0
Subtract 0 from 6 to get 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 7:
18 can be fit into 60 3 times, resulting in a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 30670.3
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.

Step 8:
If we divide 60 by 18, we get 3 and a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 30670.33
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 final outcome is 30670.33, with a leftover of 0.006.