We're dividing 819238 by 20 
The aim is to understand the frequency of 20 in 819238.

Step 1:
8 divided by 20 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 20

Going ahead to step 2:
The number 20 fits into 81 4 times, leaving a remainder of 1.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
The remainder is 1 after subtracting 80 from 81.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 20

On to step 3:
When dividing 19 by 20, we get 0 with a remainder of 19.
Use 0 as the next digit of our solution. 
Result so far: 40.0
If we subtract 0 from 19, we get 19.
Take the next digit (2) from the dividend and append it to 19, then repeat: 192 / 20

Step 4:
The number 20 fits into 192 9 times, leaving a remainder of 12.
The next digit of our result is 9. 
Result so far: 409.0
Subtracting 180 from 192 leaves us with 12.
Fetch the next digit (3) from the dividend, attach it to 12 and continue: 123 / 20

Advancing to step 5:
123 divided by 20 is 6 with a remainder of 3.
The number 6 becomes the next digit in our result. 
Result so far: 4096.0
If we take 120 away from 123, we end up with 3.
Bring next digit (8) of the dividend behind the 3 and repeat the process: 38 / 20

Advancing to step 6:
When dividing 38 by 20, we get 1 with a remainder of 18.
Put 1 as the next digit of the answer. 
Result so far: 40961.0
The remainder is 18 after subtracting 20 from 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 7:
20 goes into 180 9 times with a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 40961.9
Subtract 180 from 180 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.

On to step 8:
20 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 40961.9
The remainder is 0 after subtracting 0 from 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: 40961.9
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 40961.9 with a remainder of 0.0.