3980 divided by 20 
The aim is to understand the frequency of 20 in 3980.

Let's proceed to step 1:
3 divided by 20 is 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 20

Moving on to step 2:
20 goes into 39 1 times with a remainder of 19.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 19 after subtracting 20 from 39.
Grab the next digit (8) from the dividend, add it to 19, then carry on: 198 / 20

On to step 3:
When dividing 198 by 20, we get 9 with a remainder of 18.
The next digit of our result is 9. 
Result so far: 19.0
Deduct 180 from 198 and we're left with 18.
Fetch the next digit (0) from the dividend, attach it to 18 and continue: 180 / 20

Moving on to step 4:
If we divide 180 by 20, we get 9 and a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 199.0
The remainder is 0 after subtracting 180 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 5:
20 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 199.0
Subtracting 0 from 0 leaves us 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 6:
20 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 199.0
If we take 0 away from 0, we end up 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.

In conclusion, the division gives 199.0 with a balance of 0.0.