428757 ÷ 20 
The aim is to understand the frequency of 20 in 428757.

Moving on to step 1:
The number 20 fits into 4 0 times, leaving a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 20

Step 2:
The number 20 fits into 42 2 times, leaving a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtracting 40 from 42 leaves us with 2.
Include the next digit (8) from the dividend after 2, then repeat: 28 / 20

Moving on to step 3:
If we divide 28 by 20, we get 1 and a remainder of 8.
The number 1 becomes the next digit in our result. 
Result so far: 21.0
Subtracting 20 from 28 leaves us with 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 20

Moving on to step 4:
87 divided by 20 is 4 with a remainder of 7.
Use 4 as the next digit of our solution. 
Result so far: 214.0
Deduct 80 from 87 and we're left with 7.
Take the next digit (5) from the dividend and append it to 7, then repeat: 75 / 20

Going ahead to step 5:
20 can be fit into 75 3 times, resulting in a remainder of 15.
The next digit of our result is 3. 
Result so far: 2143.0
If we subtract 60 from 75, we get 15.
Take the next digit (7) from the dividend and append it to 15, then repeat: 157 / 20

Going ahead to step 6:
The number 20 fits into 157 7 times, leaving a remainder of 17.
Record the quotient 7 as the next digit in the result. 
Result so far: 21437.0
Deduct 140 from 157 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 7:
20 goes into 170 8 times with a remainder of 10.
Record the quotient 8 as the next digit in the result. 
Result so far: 21437.8
The remainder is 10 after subtracting 160 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
The number 20 fits into 100 5 times, leaving a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 21437.85
Subtracting 100 from 100 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.

Moving on to step 9:
20 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 21437.85
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.

Step 10:
20 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 21437.85
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 21437.85 with a remaining 0.0.