We're dividing 90445454 by 20 
The aim is to understand the frequency of 20 in 90445454.

Going ahead to step 1:
20 goes into 9 0 times with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Fetch the next digit (0) from the dividend, attach it to 9 and continue: 90 / 20

Moving on to step 2:
90 divided by 20 is 4 with a remainder of 10.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtract 80 from 90 to get 10.
Bring next digit (4) of the dividend behind the 10 and repeat the process: 104 / 20

Advancing to step 3:
20 goes into 104 5 times with a remainder of 4.
Write down 5 as next digit of the result. 
Result so far: 45.0
Subtract 100 from 104 to get 4.
Append the next digit (4) from the dividend to 4 and continue with: 44 / 20

Going ahead to step 4:
The number 20 fits into 44 2 times, leaving a remainder of 4.
Record the quotient 2 as the next digit in the result. 
Result so far: 452.0
Subtract 40 from 44 to get 4.
Include the next digit (5) from the dividend after 4, then repeat: 45 / 20

Going ahead to step 5:
20 can be fit into 45 2 times, resulting in a remainder of 5.
Write down 2 as next digit of the result. 
Result so far: 4522.0
Subtracting 40 from 45 leaves us with 5.
Take the next digit (4) from the dividend and append it to 5, then repeat: 54 / 20

Moving on to step 6:
20 can be fit into 54 2 times, resulting in a remainder of 14.
Write down 2 as next digit of the result. 
Result so far: 45222.0
Subtract 40 from 54 to get 14.
Append the next digit (5) from the dividend to 14 and continue with: 145 / 20

Going ahead to step 7:
The number 20 fits into 145 7 times, leaving a remainder of 5.
Use 7 as the next digit of our solution. 
Result so far: 452227.0
Subtracting 140 from 145 leaves us with 5.
Append the next digit (4) from the dividend to 5 and continue with: 54 / 20

Step 8:
20 can be fit into 54 2 times, resulting in a remainder of 14.
Record the quotient 2 as the next digit in the result. 
Result so far: 4522272.0
If we subtract 40 from 54, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 9:
When dividing 140 by 20, we get 7 with a remainder of 0.
Write down 7 as next digit of the result. 
Result so far: 4522272.7
If we take 140 away from 140, 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.

On to step 10:
If we divide 0 by 20, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 4522272.7
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.

Advancing to step 11:
If we divide 0 by 20, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 4522272.7
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 quotient of the division is 4522272.7, and the remainder is 0.0.