We look at the division of 806545 by 20 
The aim is to understand the frequency of 20 in 806545.

Advancing to step 1:
20 can be fit into 8 0 times, resulting in a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Include the next digit (0) from the dividend after 8, then repeat: 80 / 20

Moving on to step 2:
When dividing 80 by 20, we get 4 with a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 4.0
The remainder is 0 after subtracting 80 from 80.
Fetch the next digit (6) from the dividend, attach it to 0 and continue: 6 / 20

Moving on to step 3:
When dividing 6 by 20, we get 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 40.0
If we subtract 0 from 6, we get 6.
Include the next digit (5) from the dividend after 6, then repeat: 65 / 20

Moving on to step 4:
When dividing 65 by 20, we get 3 with a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 403.0
Subtracting 60 from 65 leaves us with 5.
Grab the next digit (4) from the dividend, add it to 5, then carry on: 54 / 20

Going ahead to step 5:
When dividing 54 by 20, we get 2 with a remainder of 14.
The next digit of our result is 2. 
Result so far: 4032.0
Deduct 40 from 54 and we're left with 14.
Fetch the next digit (5) from the dividend, attach it to 14 and continue: 145 / 20

On to step 6:
20 can be fit into 145 7 times, resulting in a remainder of 5.
Put 7 as the next digit of the answer. 
Result so far: 40327.0
If we take 140 away from 145, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 7:
20 goes into 50 2 times with a remainder of 10.
The next digit of our result is 2. 
Result so far: 40327.2
Subtracting 40 from 50 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.

Moving on to step 8:
20 goes into 100 5 times with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 40327.25
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.

On to step 9:
0 divided by 20 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 40327.25
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.

On to step 10:
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: 40327.25
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.

Our division results in 40327.25 with a remaining 0.0.