We're dividing 205668 by 12 
The aim is to understand the frequency of 12 in 205668.

On to step 1:
12 goes into 2 0 times with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (0) from the dividend, attach it to 2 and continue: 20 / 12

On to step 2:
The number 12 fits into 20 1 times, leaving a remainder of 8.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 12 away from 20, we end up with 8.
Append the next digit (5) from the dividend to 8 and continue with: 85 / 12

Moving on to step 3:
85 divided by 12 is 7 with a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 17.0
Subtract 84 from 85 to get 1.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 12

Advancing to step 4:
12 goes into 16 1 times with a remainder of 4.
Put 1 as the next digit of the answer. 
Result so far: 171.0
The remainder is 4 after subtracting 12 from 16.
Append the next digit (6) from the dividend to 4 and continue with: 46 / 12

On to step 5:
46 divided by 12 is 3 with a remainder of 10.
The number 3 becomes the next digit in our result. 
Result so far: 1713.0
If we take 36 away from 46, we end up with 10.
Bring next digit (8) of the dividend behind the 10 and repeat the process: 108 / 12

Step 6:
108 divided by 12 is 9 with a remainder of 0.
The next digit of our result is 9. 
Result so far: 17139.0
The remainder is 0 after subtracting 108 from 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 7:
12 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 17139.0
Deduct 0 from 0 and we're left 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.

Step 8:
When dividing 0 by 12, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 17139.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 17139.0 with a remaining 0.0.