577886 ÷ 20 
The aim is to understand the frequency of 20 in 577886.

Step 1:
5 divided by 20 is 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Take the next digit (7) from the dividend and append it to 5, then repeat: 57 / 20

Going ahead to step 2:
If we divide 57 by 20, we get 2 and a remainder of 17.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 40 from 57, we get 17.
Take the next digit (7) from the dividend and append it to 17, then repeat: 177 / 20

Moving on to step 3:
The number 20 fits into 177 8 times, leaving a remainder of 17.
Put 8 as the next digit of the answer. 
Result so far: 28.0
The remainder is 17 after subtracting 160 from 177.
Bring next digit (8) of the dividend behind the 17 and repeat the process: 178 / 20

On to step 4:
20 goes into 178 8 times with a remainder of 18.
Record the quotient 8 as the next digit in the result. 
Result so far: 288.0
Subtract 160 from 178 to get 18.
Append the next digit (8) from the dividend to 18 and continue with: 188 / 20

Moving on to step 5:
If we divide 188 by 20, we get 9 and a remainder of 8.
The next digit of our result is 9. 
Result so far: 2889.0
If we subtract 180 from 188, we get 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 20

Advancing to step 6:
The number 20 fits into 86 4 times, leaving a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 28894.0
If we subtract 80 from 86, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 7:
60 divided by 20 is 3 with a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 28894.3
Subtract 60 from 60 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.

Moving on to step 8:
When dividing 0 by 20, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 28894.3
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.

Let's proceed to step 9:
When dividing 0 by 20, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 28894.3
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.

Our division results in 28894.3 with a remaining 0.0.