508955 ÷ 20 
The aim is to understand the frequency of 20 in 508955.

Advancing to step 1:
5 divided by 20 is 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Include the next digit (0) from the dividend after 5, then repeat: 50 / 20

Advancing to step 2:
20 goes into 50 2 times with a remainder of 10.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 40 away from 50, we end up with 10.
Take the next digit (8) from the dividend and append it to 10, then repeat: 108 / 20

Let's proceed to step 3:
If we divide 108 by 20, we get 5 and a remainder of 8.
The number 5 becomes the next digit in our result. 
Result so far: 25.0
Subtract 100 from 108 to get 8.
Take the next digit (9) from the dividend and append it to 8, then repeat: 89 / 20

Going ahead to step 4:
89 divided by 20 is 4 with a remainder of 9.
Use 4 as the next digit of our solution. 
Result so far: 254.0
Deduct 80 from 89 and we're left with 9.
Grab the next digit (5) from the dividend, add it to 9, then carry on: 95 / 20

Moving on to step 5:
When dividing 95 by 20, we get 4 with a remainder of 15.
Record the quotient 4 as the next digit in the result. 
Result so far: 2544.0
If we subtract 80 from 95, we get 15.
Bring next digit (5) of the dividend behind the 15 and repeat the process: 155 / 20

Going ahead to step 6:
155 divided by 20 is 7 with a remainder of 15.
Record the quotient 7 as the next digit in the result. 
Result so far: 25447.0
Subtract 140 from 155 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 7:
When dividing 150 by 20, we get 7 with a remainder of 10.
The number 7 becomes the next digit in our result. 
Result so far: 25447.7
Deduct 140 from 150 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
100 divided by 20 is 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 25447.75
The remainder is 0 after subtracting 100 from 100.
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.
Write down 0 as next digit of the result. 
Result so far: 25447.75
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.

Let's proceed to step 10:
0 divided by 20 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 25447.75
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.

After the division, we end up with 25447.75 and a remainder of 0.0.