We divide 512926 by 20
The aim is to understand the frequency of 20 in 512926.

Let's proceed to step 1:
If we divide 5 by 20, we get 0 and a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 20

Going ahead to step 2:
20 can be fit into 51 2 times, resulting in a remainder of 11.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we take 40 away from 51, we end up with 11.
Take the next digit (2) from the dividend and append it to 11, then repeat: 112 / 20

Step 3:
20 can be fit into 112 5 times, resulting in a remainder of 12.
Use 5 as the next digit of our solution. 
Result so far: 25.0
Deduct 100 from 112 and we're left with 12.
Append the next digit (9) from the dividend to 12 and continue with: 129 / 20

Going ahead to step 4:
20 can be fit into 129 6 times, resulting in a remainder of 9.
The number 6 becomes the next digit in our result. 
Result so far: 256.0
The remainder is 9 after subtracting 120 from 129.
Append the next digit (2) from the dividend to 9 and continue with: 92 / 20

Moving on to step 5:
If we divide 92 by 20, we get 4 and a remainder of 12.
Record the quotient 4 as the next digit in the result. 
Result so far: 2564.0
Subtract 80 from 92 to get 12.
Append the next digit (6) from the dividend to 12 and continue with: 126 / 20

Moving on to step 6:
20 goes into 126 6 times with a remainder of 6.
Write down 6 as next digit of the result. 
Result so far: 25646.0
If we take 120 away from 126, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 7:
20 can be fit into 60 3 times, resulting in a remainder of 0.
The next digit of our result is 3. 
Result so far: 25646.3
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:
0 divided by 20 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 25646.3
Subtracting 0 from 0 leaves us 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 9:
If we divide 0 by 20, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 25646.3
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 25646.3 and a remainder of 0.0.