We look at the division of 442551 by 20 
The aim is to understand the frequency of 20 in 442551.

Moving on to step 1:
The number 20 fits into 4 0 times, leaving a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Take the next digit (4) from the dividend and append it to 4, then repeat: 44 / 20

Step 2:
When dividing 44 by 20, we get 2 with a remainder of 4.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 40 from 44 and we're left with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 20

Advancing to step 3:
If we divide 42 by 20, we get 2 and a remainder of 2.
The next digit of our result is 2. 
Result so far: 22.0
Subtracting 40 from 42 leaves us with 2.
Take the next digit (5) from the dividend and append it to 2, then repeat: 25 / 20

Moving on to step 4:
20 can be fit into 25 1 times, resulting in a remainder of 5.
Record the quotient 1 as the next digit in the result. 
Result so far: 221.0
Subtract 20 from 25 to get 5.
Bring next digit (5) of the dividend behind the 5 and repeat the process: 55 / 20

Going ahead to step 5:
If we divide 55 by 20, we get 2 and a remainder of 15.
Write down 2 as next digit of the result. 
Result so far: 2212.0
If we take 40 away from 55, we end up with 15.
Grab the next digit (1) from the dividend, add it to 15, then carry on: 151 / 20

Going ahead to step 6:
The number 20 fits into 151 7 times, leaving a remainder of 11.
The next digit of our result is 7. 
Result so far: 22127.0
Subtract 140 from 151 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 7:
The number 20 fits into 110 5 times, leaving a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 22127.5
Subtracting 100 from 110 leaves us 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.

Advancing to step 8:
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: 22127.55
Subtracting 100 from 100 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.

The final result is 22127.55 with a remainder of 0.0.