571707 divided by 20 
The aim is to understand the frequency of 20 in 571707.

On to step 1:
20 can be fit into 5 0 times, resulting in a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Append the next digit (7) from the dividend to 5 and continue with: 57 / 20

Advancing to step 2:
The number 20 fits into 57 2 times, leaving a remainder of 17.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtracting 40 from 57 leaves us with 17.
Grab the next digit (1) from the dividend, add it to 17, then carry on: 171 / 20

Going ahead to step 3:
When dividing 171 by 20, we get 8 with a remainder of 11.
The next digit of our result is 8. 
Result so far: 28.0
Subtract 160 from 171 to get 11.
Append the next digit (7) from the dividend to 11 and continue with: 117 / 20

Going ahead to step 4:
When dividing 117 by 20, we get 5 with a remainder of 17.
Use 5 as the next digit of our solution. 
Result so far: 285.0
Subtract 100 from 117 to get 17.
Include the next digit (0) from the dividend after 17, then repeat: 170 / 20

Moving on to step 5:
The number 20 fits into 170 8 times, leaving a remainder of 10.
Record the quotient 8 as the next digit in the result. 
Result so far: 2858.0
Subtracting 160 from 170 leaves us with 10.
Include the next digit (7) from the dividend after 10, then repeat: 107 / 20

Moving on to step 6:
If we divide 107 by 20, we get 5 and a remainder of 7.
Use 5 as the next digit of our solution. 
Result so far: 28585.0
Subtracting 100 from 107 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 7:
If we divide 70 by 20, we get 3 and a remainder of 10.
Use 3 as the next digit of our solution. 
Result so far: 28585.3
Subtract 60 from 70 to get 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:
20 can be fit into 100 5 times, resulting in a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 28585.35
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.

Going ahead to step 9:
0 divided by 20 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 28585.35
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.

Advancing to step 10:
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: 28585.35
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.

After the division, we end up with 28585.35 and a remainder of 0.0.