We're dividing 45393845 by 20 
The aim is to understand the frequency of 20 in 45393845.

Let's proceed to step 1:
20 can be fit into 4 0 times, resulting in 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.
Include the next digit (5) from the dividend after 4, then repeat: 45 / 20

Moving on to step 2:
The number 20 fits into 45 2 times, leaving a remainder of 5.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 40 from 45 leaves us with 5.
Fetch the next digit (3) from the dividend, attach it to 5 and continue: 53 / 20

Let's proceed to step 3:
20 goes into 53 2 times with a remainder of 13.
The number 2 becomes the next digit in our result. 
Result so far: 22.0
If we subtract 40 from 53, we get 13.
Fetch the next digit (9) from the dividend, attach it to 13 and continue: 139 / 20

Moving on to step 4:
20 can be fit into 139 6 times, resulting in a remainder of 19.
The number 6 becomes the next digit in our result. 
Result so far: 226.0
Subtract 120 from 139 to get 19.
Fetch the next digit (3) from the dividend, attach it to 19 and continue: 193 / 20

On to step 5:
20 can be fit into 193 9 times, resulting in a remainder of 13.
The number 9 becomes the next digit in our result. 
Result so far: 2269.0
The remainder is 13 after subtracting 180 from 193.
Append the next digit (8) from the dividend to 13 and continue with: 138 / 20

Moving on to step 6:
When dividing 138 by 20, we get 6 with a remainder of 18.
The number 6 becomes the next digit in our result. 
Result so far: 22696.0
If we subtract 120 from 138, we get 18.
Grab the next digit (4) from the dividend, add it to 18, then carry on: 184 / 20

Going ahead to step 7:
When dividing 184 by 20, we get 9 with a remainder of 4.
The number 9 becomes the next digit in our result. 
Result so far: 226969.0
Subtracting 180 from 184 leaves us with 4.
Append the next digit (5) from the dividend to 4 and continue with: 45 / 20

Moving on to step 8:
When dividing 45 by 20, we get 2 with a remainder of 5.
Write down 2 as next digit of the result. 
Result so far: 2269692.0
Subtract 40 from 45 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 9:
20 goes into 50 2 times with a remainder of 10.
Use 2 as the next digit of our solution. 
Result so far: 2269692.2
If we subtract 40 from 50, we get 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 10:
20 can be fit into 100 5 times, resulting in a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 2269692.25
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.

Let's proceed to step 11:
When dividing 0 by 20, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 2269692.25
The remainder is 0 after subtracting 0 from 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 12:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 2269692.25
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.

After the division, we end up with 2269692.25 and a remainder of 0.0.