Let's divide 311445 by 18
The aim is to understand the frequency of 18 in 311445.

Let's proceed to step 1:
When dividing 3 by 18, we get 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 18

Step 2:
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: 1.0
Subtract 18 from 31 to get 13.
Bring next digit (1) of the dividend behind the 13 and repeat the process: 131 / 18

On to step 3:
If we divide 131 by 18, we get 7 and a remainder of 5.
Write down 7 as next digit of the result. 
Result so far: 17.0
Deduct 126 from 131 and we're left with 5.
Take the next digit (4) from the dividend and append it to 5, then repeat: 54 / 18

Going ahead to step 4:
18 goes into 54 3 times with a remainder of 0.
Put 3 as the next digit of the answer. 
Result so far: 173.0
If we subtract 54 from 54, we get 0.
Include the next digit (4) from the dividend after 0, then repeat: 4 / 18

Going ahead to step 5:
4 divided by 18 is 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 1730.0
Subtracting 0 from 4 leaves us with 4.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 18

Advancing to step 6:
The number 18 fits into 45 2 times, leaving a remainder of 9.
Record the quotient 2 as the next digit in the result. 
Result so far: 17302.0
If we take 36 away from 45, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 7:
90 divided by 18 is 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 17302.5
The remainder is 0 after subtracting 90 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 8:
18 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 17302.5
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 9:
If we divide 0 by 18, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 17302.5
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 17302.5 with a remainder of 0.0.