We look at the division of 551149 by 20 
The aim is to understand the frequency of 20 in 551149.

Step 1:
If we divide 5 by 20, we get 0 and a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Include the next digit (5) from the dividend after 5, then repeat: 55 / 20

Advancing to step 2:
If we divide 55 by 20, we get 2 and a remainder of 15.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we take 40 away from 55, we end up with 15.
Fetch the next digit (1) from the dividend, attach it to 15 and continue: 151 / 20

Moving on to step 3:
The number 20 fits into 151 7 times, leaving a remainder of 11.
Use 7 as the next digit of our solution. 
Result so far: 27.0
Subtract 140 from 151 to get 11.
Grab the next digit (1) from the dividend, add it to 11, then carry on: 111 / 20

Advancing to step 4:
20 goes into 111 5 times with a remainder of 11.
Write down 5 as next digit of the result. 
Result so far: 275.0
Subtracting 100 from 111 leaves us with 11.
Include the next digit (4) from the dividend after 11, then repeat: 114 / 20

Advancing to step 5:
114 divided by 20 is 5 with a remainder of 14.
The number 5 becomes the next digit in our result. 
Result so far: 2755.0
The remainder is 14 after subtracting 100 from 114.
Append the next digit (9) from the dividend to 14 and continue with: 149 / 20

Step 6:
The number 20 fits into 149 7 times, leaving a remainder of 9.
The next digit of our result is 7. 
Result so far: 27557.0
If we take 140 away from 149, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 7:
20 goes into 90 4 times with a remainder of 10.
The number 4 becomes the next digit in our result. 
Result so far: 27557.4
The remainder is 10 after subtracting 80 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
100 divided by 20 is 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 27557.45
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.

Let's proceed to step 9:
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: 27557.45
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.

On to step 10:
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: 27557.45
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.

After the division, we end up with 27557.45 and a remainder of 0.0.