575829 divided by 20 
The aim is to understand the frequency of 20 in 575829.

On to step 1:
20 goes into 5 0 times with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Bring next digit (7) of the dividend behind the 5 and repeat the process: 57 / 20

On to step 2:
The number 20 fits into 57 2 times, leaving a remainder of 17.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 17 after subtracting 40 from 57.
Take the next digit (5) from the dividend and append it to 17, then repeat: 175 / 20

Advancing to step 3:
20 goes into 175 8 times with a remainder of 15.
Use 8 as the next digit of our solution. 
Result so far: 28.0
The remainder is 15 after subtracting 160 from 175.
Grab the next digit (8) from the dividend, add it to 15, then carry on: 158 / 20

Step 4:
The number 20 fits into 158 7 times, leaving a remainder of 18.
Write down 7 as next digit of the result. 
Result so far: 287.0
Subtract 140 from 158 to get 18.
Append the next digit (2) from the dividend to 18 and continue with: 182 / 20

Advancing to step 5:
20 goes into 182 9 times with a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 2879.0
Deduct 180 from 182 and we're left with 2.
Fetch the next digit (9) from the dividend, attach it to 2 and continue: 29 / 20

Step 6:
20 can be fit into 29 1 times, resulting in a remainder of 9.
Write down 1 as next digit of the result. 
Result so far: 28791.0
The remainder is 9 after subtracting 20 from 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 7:
90 divided by 20 is 4 with a remainder of 10.
Record the quotient 4 as the next digit in the result. 
Result so far: 28791.4
Deduct 80 from 90 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.

Advancing to step 8:
20 can be fit into 100 5 times, resulting in a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 28791.45
If we subtract 100 from 100, 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.

Advancing to step 9:
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: 28791.45
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.

Moving on to step 10:
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: 28791.45
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.

After the division, we end up with 28791.45 and a remainder of 0.0.