We're dividing 55390989 by 20 
The aim is to understand the frequency of 20 in 55390989.

Let's proceed to step 1:
When dividing 5 by 20, we get 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Append the next digit (5) from the dividend to 5 and continue with: 55 / 20

Advancing to step 2:
If we divide 55 by 20, we get 2 and a remainder of 15.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 40 from 55, we get 15.
Bring next digit (3) of the dividend behind the 15 and repeat the process: 153 / 20

Going ahead to step 3:
The number 20 fits into 153 7 times, leaving a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 27.0
Subtracting 140 from 153 leaves us with 13.
Fetch the next digit (9) from the dividend, attach it to 13 and continue: 139 / 20

Moving on to step 4:
20 goes into 139 6 times with a remainder of 19.
Record the quotient 6 as the next digit in the result. 
Result so far: 276.0
Deduct 120 from 139 and we're left with 19.
Append the next digit (0) from the dividend to 19 and continue with: 190 / 20

Let's proceed to step 5:
When dividing 190 by 20, we get 9 with a remainder of 10.
Record the quotient 9 as the next digit in the result. 
Result so far: 2769.0
Subtracting 180 from 190 leaves us with 10.
Bring next digit (9) of the dividend behind the 10 and repeat the process: 109 / 20

Step 6:
20 can be fit into 109 5 times, resulting in a remainder of 9.
Write down 5 as next digit of the result. 
Result so far: 27695.0
The remainder is 9 after subtracting 100 from 109.
Include the next digit (8) from the dividend after 9, then repeat: 98 / 20

Step 7:
When dividing 98 by 20, we get 4 with a remainder of 18.
The next digit of our result is 4. 
Result so far: 276954.0
The remainder is 18 after subtracting 80 from 98.
Fetch the next digit (9) from the dividend, attach it to 18 and continue: 189 / 20

Advancing to step 8:
If we divide 189 by 20, we get 9 and a remainder of 9.
Write down 9 as next digit of the result. 
Result so far: 2769549.0
If we subtract 180 from 189, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 9:
When dividing 90 by 20, we get 4 with a remainder of 10.
Put 4 as the next digit of the answer. 
Result so far: 2769549.4
If we take 80 away from 90, we end up 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 10:
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: 2769549.45
Subtract 100 from 100 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.

Going ahead to step 11:
20 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 2769549.45
Subtracting 0 from 0 leaves us 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.

Let's proceed to step 12:
20 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 2769549.45
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 2769549.45 with a remainder of 0.0.