485758 divided by 20 
The aim is to understand the frequency of 20 in 485758.

Advancing 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
Deduct 0 from 4 and we're left with 4.
Include the next digit (8) from the dividend after 4, then repeat: 48 / 20

Step 2:
The number 20 fits into 48 2 times, leaving a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 8 after subtracting 40 from 48.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 20

Going ahead to step 3:
20 can be fit into 85 4 times, resulting in a remainder of 5.
The next digit of our result is 4. 
Result so far: 24.0
Deduct 80 from 85 and we're left with 5.
Grab the next digit (7) from the dividend, add it to 5, then carry on: 57 / 20

Moving on to step 4:
If we divide 57 by 20, we get 2 and a remainder of 17.
The next digit of our result is 2. 
Result so far: 242.0
Deduct 40 from 57 and we're left with 17.
Bring next digit (5) of the dividend behind the 17 and repeat the process: 175 / 20

Moving on to step 5:
If we divide 175 by 20, we get 8 and a remainder of 15.
Write down 8 as next digit of the result. 
Result so far: 2428.0
Deduct 160 from 175 and we're left with 15.
Include the next digit (8) from the dividend after 15, then repeat: 158 / 20

Moving on to step 6:
If we divide 158 by 20, we get 7 and a remainder of 18.
The next digit of our result is 7. 
Result so far: 24287.0
The remainder is 18 after subtracting 140 from 158.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 7:
20 goes into 180 9 times with a remainder of 0.
Write down 9 as next digit of the result. 
Result so far: 24287.9
The remainder is 0 after subtracting 180 from 180.
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:
When dividing 0 by 20, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 24287.9
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.

Going ahead to step 9:
If we divide 0 by 20, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 24287.9
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 24287.9 with a remaining 0.0.