500381 ÷ 20 
The aim is to understand the frequency of 20 in 500381.

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 (0) from the dividend to 5 and continue with: 50 / 20

Moving on to step 2:
50 divided by 20 is 2 with a remainder of 10.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtracting 40 from 50 leaves us with 10.
Fetch the next digit (0) from the dividend, attach it to 10 and continue: 100 / 20

Let's proceed to step 3:
If we divide 100 by 20, we get 5 and a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 25.0
Subtracting 100 from 100 leaves us with 0.
Grab the next digit (3) from the dividend, add it to 0, then carry on: 3 / 20

Going ahead to step 4:
20 goes into 3 0 times with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 250.0
If we subtract 0 from 3, we get 3.
Take the next digit (8) from the dividend and append it to 3, then repeat: 38 / 20

Let's proceed to step 5:
20 goes into 38 1 times with a remainder of 18.
Put 1 as the next digit of the answer. 
Result so far: 2501.0
If we take 20 away from 38, we end up with 18.
Include the next digit (1) from the dividend after 18, then repeat: 181 / 20

On to step 6:
20 can be fit into 181 9 times, resulting in a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 25019.0
Deduct 180 from 181 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 7:
20 goes into 10 0 times with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 25019.0
Subtracting 0 from 10 leaves us 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.

Step 8:
If we divide 100 by 20, we get 5 and a remainder of 0.
The next digit of our result is 5. 
Result so far: 25019.05
The remainder is 0 after subtracting 100 from 100.
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:
20 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 25019.05
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 10:
The number 20 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 25019.05
If we take 0 away from 0, we end up 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.

The final result is 25019.05 with a remainder of 0.0.