Let's divide 66781 by 18
The aim is to understand the frequency of 18 in 66781.

Advancing to step 1:
18 can be fit into 6 0 times, resulting in a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 18

Let's proceed to step 2:
66 divided by 18 is 3 with a remainder of 12.
Use 3 as the next digit of our solution. 
Result so far: 3.0
The remainder is 12 after subtracting 54 from 66.
Take the next digit (7) from the dividend and append it to 12, then repeat: 127 / 18

On to step 3:
If we divide 127 by 18, we get 7 and a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 37.0
The remainder is 1 after subtracting 126 from 127.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 18

Let's proceed to step 4:
The number 18 fits into 18 1 times, leaving a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 371.0
Deduct 18 from 18 and we're left with 0.
Grab the next digit (1) from the dividend, add it to 0, then carry on: 1 / 18

Advancing to step 5:
The number 18 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 3710.0
The remainder is 1 after subtracting 0 from 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 6:
If we divide 10 by 18, we get 0 and a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 3710.0
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 7:
When dividing 100 by 18, we get 5 with a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 3710.05
Subtract 90 from 100 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
18 can be fit into 100 5 times, resulting in a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 3710.055
Subtract 90 from 100 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Our division results in 3710.055 with a remaining 0.001.