We look at the division of 43256 by 20 
The aim is to understand the frequency of 20 in 43256.

On to step 1:
20 can be fit into 4 0 times, resulting in a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Grab the next digit (3) from the dividend, add it to 4, then carry on: 43 / 20

Step 2:
The number 20 fits into 43 2 times, leaving a remainder of 3.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Deduct 40 from 43 and we're left with 3.
Take the next digit (2) from the dividend and append it to 3, then repeat: 32 / 20

Step 3:
20 can be fit into 32 1 times, resulting in a remainder of 12.
Record the quotient 1 as the next digit in the result. 
Result so far: 21.0
If we subtract 20 from 32, we get 12.
Append the next digit (5) from the dividend to 12 and continue with: 125 / 20

Step 4:
20 goes into 125 6 times with a remainder of 5.
Record the quotient 6 as the next digit in the result. 
Result so far: 216.0
If we take 120 away from 125, we end up with 5.
Grab the next digit (6) from the dividend, add it to 5, then carry on: 56 / 20

Moving on to step 5:
20 goes into 56 2 times with a remainder of 16.
Use 2 as the next digit of our solution. 
Result so far: 2162.0
Subtract 40 from 56 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 6:
The number 20 fits into 160 8 times, leaving a remainder of 0.
The next digit of our result is 8. 
Result so far: 2162.8
Subtract 160 from 160 to 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.

On to step 7:
0 divided by 20 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 2162.8
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
20 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 2162.8
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.

The quotient of the division is 2162.8, and the remainder is 0.0.