We're dividing 900272 by 20 
The aim is to understand the frequency of 20 in 900272.

Step 1:
If we divide 9 by 20, we get 0 and a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 20

Step 2:
When dividing 90 by 20, we get 4 with a remainder of 10.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Deduct 80 from 90 and we're left with 10.
Append the next digit (0) from the dividend to 10 and continue with: 100 / 20

Moving on to step 3:
20 can be fit into 100 5 times, resulting in a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 45.0
Subtract 100 from 100 to get 0.
Append the next digit (2) from the dividend to 0 and continue with: 2 / 20

Advancing to step 4:
The number 20 fits into 2 0 times, leaving a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 450.0
Subtract 0 from 2 to get 2.
Bring next digit (7) of the dividend behind the 2 and repeat the process: 27 / 20

Step 5:
27 divided by 20 is 1 with a remainder of 7.
The next digit of our result is 1. 
Result so far: 4501.0
Subtract 20 from 27 to get 7.
Append the next digit (2) from the dividend to 7 and continue with: 72 / 20

Let's proceed to step 6:
20 can be fit into 72 3 times, resulting in a remainder of 12.
Record the quotient 3 as the next digit in the result. 
Result so far: 45013.0
Subtracting 60 from 72 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 7:
120 divided by 20 is 6 with a remainder of 0.
The next digit of our result is 6. 
Result so far: 45013.6
If we take 120 away from 120, 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 8:
0 divided by 20 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 45013.6
If we subtract 0 from 0, 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.

Advancing to step 9:
0 divided by 20 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 45013.6
If we subtract 0 from 0, 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.

After the division, we end up with 45013.6 and a remainder of 0.0.