576310 divided by 18 
The aim is to understand the frequency of 18 in 576310.

Advancing to step 1:
The number 18 fits into 5 0 times, leaving a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Bring next digit (7) of the dividend behind the 5 and repeat the process: 57 / 18

On to step 2:
If we divide 57 by 18, we get 3 and a remainder of 3.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
The remainder is 3 after subtracting 54 from 57.
Fetch the next digit (6) from the dividend, attach it to 3 and continue: 36 / 18

Moving on to step 3:
When dividing 36 by 18, we get 2 with a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 32.0
The remainder is 0 after subtracting 36 from 36.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 18

Let's proceed to step 4:
When dividing 3 by 18, we get 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 320.0
Deduct 0 from 3 and we're left with 3.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 18

Step 5:
If we divide 31 by 18, we get 1 and a remainder of 13.
Record the quotient 1 as the next digit in the result. 
Result so far: 3201.0
Deduct 18 from 31 and we're left with 13.
Append the next digit (0) from the dividend to 13 and continue with: 130 / 18

On to step 6:
18 can be fit into 130 7 times, resulting in a remainder of 4.
Record the quotient 7 as the next digit in the result. 
Result so far: 32017.0
Subtracting 126 from 130 leaves us 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.

On to step 7:
When dividing 40 by 18, we get 2 with a remainder of 4.
The next digit of our result is 2. 
Result so far: 32017.2
Subtracting 36 from 40 leaves us 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.

Going ahead to step 8:
18 goes into 40 2 times with a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 32017.22
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.

The final result is 32017.22 with a remainder of 0.004.