360321 ÷ 18 
The aim is to understand the frequency of 18 in 360321.

On to step 1:
The number 18 fits into 3 0 times, leaving a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Append the next digit (6) from the dividend to 3 and continue with: 36 / 18

Advancing to step 2:
18 can be fit into 36 2 times, resulting in a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 2.0
Deduct 36 from 36 and we're left with 0.
Append the next digit (0) from the dividend to 0 and continue with: 0 / 18

On to step 3:
0 divided by 18 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 20.0
Deduct 0 from 0 and we're left with 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 18

Going ahead to step 4:
18 goes into 3 0 times with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 200.0
Subtract 0 from 3 to get 3.
Take the next digit (2) from the dividend and append it to 3, then repeat: 32 / 18

Going ahead to step 5:
The number 18 fits into 32 1 times, leaving a remainder of 14.
Use 1 as the next digit of our solution. 
Result so far: 2001.0
Subtract 18 from 32 to get 14.
Fetch the next digit (1) from the dividend, attach it to 14 and continue: 141 / 18

Let's proceed to step 6:
141 divided by 18 is 7 with a remainder of 15.
Use 7 as the next digit of our solution. 
Result so far: 20017.0
Subtract 126 from 141 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 7:
18 goes into 150 8 times with a remainder of 6.
The next digit of our result is 8. 
Result so far: 20017.8
Subtracting 144 from 150 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.

Going ahead to step 8:
60 divided by 18 is 3 with a remainder of 6.
The number 3 becomes the next digit in our result. 
Result so far: 20017.83
Subtract 54 from 60 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.

Moving on to step 9:
The number 18 fits into 60 3 times, leaving a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 20017.833
Subtract 54 from 60 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.

The final result is 20017.833 with a remainder of 0.0006.