456584 ÷ 20 
The aim is to understand the frequency of 20 in 456584.

On to step 1:
When dividing 4 by 20, we get 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Take the next digit (5) from the dividend and append it to 4, then repeat: 45 / 20

Advancing to step 2:
The number 20 fits into 45 2 times, leaving a remainder of 5.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 40 from 45, we get 5.
Bring next digit (6) of the dividend behind the 5 and repeat the process: 56 / 20

Going ahead to step 3:
The number 20 fits into 56 2 times, leaving a remainder of 16.
The number 2 becomes the next digit in our result. 
Result so far: 22.0
Subtracting 40 from 56 leaves us with 16.
Bring next digit (5) of the dividend behind the 16 and repeat the process: 165 / 20

Advancing to step 4:
When dividing 165 by 20, we get 8 with a remainder of 5.
Record the quotient 8 as the next digit in the result. 
Result so far: 228.0
The remainder is 5 after subtracting 160 from 165.
Bring next digit (8) of the dividend behind the 5 and repeat the process: 58 / 20

Let's proceed to step 5:
When dividing 58 by 20, we get 2 with a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 2282.0
If we take 40 away from 58, we end up with 18.
Fetch the next digit (4) from the dividend, attach it to 18 and continue: 184 / 20

Moving on to step 6:
The number 20 fits into 184 9 times, leaving a remainder of 4.
Use 9 as the next digit of our solution. 
Result so far: 22829.0
Deduct 180 from 184 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 7:
If we divide 40 by 20, we get 2 and a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 22829.2
Deduct 40 from 40 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.

Moving on to step 8:
20 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 22829.2
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.

Advancing to step 9:
0 divided by 20 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 22829.2
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.

Our division results in 22829.2 with a remaining 0.0.