Let's divide 305566 by 18
The aim is to understand the frequency of 18 in 305566.

Step 1:
18 can be fit into 3 0 times, resulting in a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Take the next digit (0) from the dividend and append it to 3, then repeat: 30 / 18

Moving on to step 2:
30 divided by 18 is 1 with a remainder of 12.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 18 from 30 leaves us with 12.
Include the next digit (5) from the dividend after 12, then repeat: 125 / 18

Moving on to step 3:
18 goes into 125 6 times with a remainder of 17.
Write down 6 as next digit of the result. 
Result so far: 16.0
If we take 108 away from 125, we end up with 17.
Take the next digit (5) from the dividend and append it to 17, then repeat: 175 / 18

Moving on to step 4:
175 divided by 18 is 9 with a remainder of 13.
Write down 9 as next digit of the result. 
Result so far: 169.0
Subtract 162 from 175 to get 13.
Grab the next digit (6) from the dividend, add it to 13, then carry on: 136 / 18

Advancing to step 5:
When dividing 136 by 18, we get 7 with a remainder of 10.
Use 7 as the next digit of our solution. 
Result so far: 1697.0
If we take 126 away from 136, we end up with 10.
Bring next digit (6) of the dividend behind the 10 and repeat the process: 106 / 18

Step 6:
106 divided by 18 is 5 with a remainder of 16.
Write down 5 as next digit of the result. 
Result so far: 16975.0
Subtract 90 from 106 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 7:
When dividing 160 by 18, we get 8 with a remainder of 16.
Record the quotient 8 as the next digit in the result. 
Result so far: 16975.8
Subtracting 144 from 160 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 8:
18 goes into 160 8 times with a remainder of 16.
Write down 8 as next digit of the result. 
Result so far: 16975.88
The remainder is 16 after subtracting 144 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final result is 16975.88 with a remainder of 0.016.