We're dividing 490343 by 20 
The aim is to understand the frequency of 20 in 490343.

Let's proceed to step 1:
20 goes into 4 0 times with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Take the next digit (9) from the dividend and append it to 4, then repeat: 49 / 20

On to step 2:
20 goes into 49 2 times with a remainder of 9.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 40 from 49, we get 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 20

Let's proceed to step 3:
20 goes into 90 4 times with a remainder of 10.
Write down 4 as next digit of the result. 
Result so far: 24.0
Deduct 80 from 90 and we're left with 10.
Include the next digit (3) from the dividend after 10, then repeat: 103 / 20

Advancing to step 4:
20 goes into 103 5 times with a remainder of 3.
The next digit of our result is 5. 
Result so far: 245.0
Subtract 100 from 103 to get 3.
Take the next digit (4) from the dividend and append it to 3, then repeat: 34 / 20

Step 5:
20 goes into 34 1 times with a remainder of 14.
Use 1 as the next digit of our solution. 
Result so far: 2451.0
Deduct 20 from 34 and we're left with 14.
Include the next digit (3) from the dividend after 14, then repeat: 143 / 20

Moving on to step 6:
The number 20 fits into 143 7 times, leaving a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 24517.0
Deduct 140 from 143 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 7:
20 goes into 30 1 times with a remainder of 10.
Put 1 as the next digit of the answer. 
Result so far: 24517.1
If we subtract 20 from 30, we 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.

Let's proceed to step 8:
If we divide 100 by 20, we get 5 and a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 24517.15
If we take 100 away from 100, 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.

Step 9:
When dividing 0 by 20, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 24517.15
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.

Moving on to step 10:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 24517.15
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.

The final result is 24517.15 with a remainder of 0.0.