We look at the division of 686132 by 18 
The aim is to understand the frequency of 18 in 686132.

Going ahead to step 1:
If we divide 6 by 18, we get 0 and a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Grab the next digit (8) from the dividend, add it to 6, then carry on: 68 / 18

Advancing to step 2:
18 can be fit into 68 3 times, resulting in a remainder of 14.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we take 54 away from 68, we end up with 14.
Bring next digit (6) of the dividend behind the 14 and repeat the process: 146 / 18

Let's proceed to step 3:
146 divided by 18 is 8 with a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 38.0
The remainder is 2 after subtracting 144 from 146.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 18

On to step 4:
18 goes into 21 1 times with a remainder of 3.
Write down 1 as next digit of the result. 
Result so far: 381.0
Subtract 18 from 21 to get 3.
Grab the next digit (3) from the dividend, add it to 3, then carry on: 33 / 18

Let's proceed to step 5:
33 divided by 18 is 1 with a remainder of 15.
The next digit of our result is 1. 
Result so far: 3811.0
Subtract 18 from 33 to get 15.
Fetch the next digit (2) from the dividend, attach it to 15 and continue: 152 / 18

Step 6:
18 goes into 152 8 times with a remainder of 8.
Use 8 as the next digit of our solution. 
Result so far: 38118.0
If we subtract 144 from 152, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 7:
The number 18 fits into 80 4 times, leaving a remainder of 8.
Put 4 as the next digit of the answer. 
Result so far: 38118.4
If we take 72 away from 80, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 8:
The number 18 fits into 80 4 times, leaving a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 38118.44
Subtract 72 from 80 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The quotient of the division is 38118.44, and the remainder is 0.008.