We're dividing 413236 by 20 
The aim is to understand the frequency of 20 in 413236.

Moving on to step 1:
When dividing 4 by 20, we get 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Grab the next digit (1) from the dividend, add it to 4, then carry on: 41 / 20

Moving on to step 2:
20 goes into 41 2 times with a remainder of 1.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 40 from 41 and we're left with 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 20

On to step 3:
13 divided by 20 is 0 with a remainder of 13.
Record the quotient 0 as the next digit in the result. 
Result so far: 20.0
If we subtract 0 from 13, we get 13.
Fetch the next digit (2) from the dividend, attach it to 13 and continue: 132 / 20

On to step 4:
132 divided by 20 is 6 with a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 206.0
The remainder is 12 after subtracting 120 from 132.
Take the next digit (3) from the dividend and append it to 12, then repeat: 123 / 20

Advancing to step 5:
When dividing 123 by 20, we get 6 with a remainder of 3.
The next digit of our result is 6. 
Result so far: 2066.0
If we subtract 120 from 123, we get 3.
Fetch the next digit (6) from the dividend, attach it to 3 and continue: 36 / 20

Let's proceed to step 6:
The number 20 fits into 36 1 times, leaving a remainder of 16.
Use 1 as the next digit of our solution. 
Result so far: 20661.0
The remainder is 16 after subtracting 20 from 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 7:
The number 20 fits into 160 8 times, leaving a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 20661.8
If we take 160 away from 160, 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.

Moving on to step 8:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 20661.8
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 9:
20 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 20661.8
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.

Our division results in 20661.8 with a remaining 0.0.