We look at the division of 401456 by 20 
The aim is to understand the frequency of 20 in 401456.

Let's proceed to step 1:
If we divide 4 by 20, we get 0 and a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 20

Advancing to step 2:
20 can be fit into 40 2 times, resulting in a remainder of 0.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 40 from 40, we get 0.
Bring next digit (1) of the dividend behind the 0 and repeat the process: 1 / 20

Step 3:
1 divided by 20 is 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 20.0
Subtract 0 from 1 to get 1.
Fetch the next digit (4) from the dividend, attach it to 1 and continue: 14 / 20

Moving on to step 4:
20 can be fit into 14 0 times, resulting in a remainder of 14.
Write down 0 as next digit of the result. 
Result so far: 200.0
The remainder is 14 after subtracting 0 from 14.
Append the next digit (5) from the dividend to 14 and continue with: 145 / 20

Moving on to step 5:
145 divided by 20 is 7 with a remainder of 5.
Write down 7 as next digit of the result. 
Result so far: 2007.0
Subtracting 140 from 145 leaves us with 5.
Fetch the next digit (6) from the dividend, attach it to 5 and continue: 56 / 20

Advancing to step 6:
The number 20 fits into 56 2 times, leaving a remainder of 16.
The next digit of our result is 2. 
Result so far: 20072.0
Subtracting 40 from 56 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 7:
If we divide 160 by 20, we get 8 and a remainder of 0.
Put 8 as the next digit of the answer. 
Result so far: 20072.8
If we take 160 away from 160, 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.

On to step 8:
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: 20072.8
Subtract 0 from 0 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.

Advancing to step 9:
0 divided by 20 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 20072.8
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.

The final result is 20072.8 with a remainder of 0.0.