We look at the division of 108546 by 18 
The aim is to understand the frequency of 18 in 108546.

On to step 1:
If we divide 1 by 18, we get 0 and a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (0) of the dividend behind the 1 and repeat the process: 10 / 18

Going ahead to step 2:
If we divide 10 by 18, we get 0 and a remainder of 10.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 10 to get 10.
Append the next digit (8) from the dividend to 10 and continue with: 108 / 18

Advancing to step 3:
If we divide 108 by 18, we get 6 and a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 6.0
If we subtract 108 from 108, we get 0.
Append the next digit (5) from the dividend to 0 and continue with: 5 / 18

On to step 4:
The number 18 fits into 5 0 times, leaving a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 60.0
If we subtract 0 from 5, we get 5.
Fetch the next digit (4) from the dividend, attach it to 5 and continue: 54 / 18

Let's proceed to step 5:
18 can be fit into 54 3 times, resulting in a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 603.0
If we take 54 away from 54, we end up with 0.
Include the next digit (6) from the dividend after 0, then repeat: 6 / 18

Step 6:
The number 18 fits into 6 0 times, leaving a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 6030.0
The remainder is 6 after subtracting 0 from 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 7:
18 goes into 60 3 times with a remainder of 6.
Record the quotient 3 as the next digit in the result. 
Result so far: 6030.3
The remainder is 6 after subtracting 54 from 60.
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.
Record the quotient 3 as the next digit in the result. 
Result so far: 6030.33
If we take 54 away from 60, we end up 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 result is 6030.33 with a remainder of 0.006.