We look at the division of 42046 by 20 
The aim is to understand the frequency of 20 in 42046.

Let's proceed to step 1:
20 goes into 4 0 times with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 20

On to step 2:
If we divide 42 by 20, we get 2 and a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we subtract 40 from 42, we get 2.
Bring next digit (0) of the dividend behind the 2 and repeat the process: 20 / 20

Let's proceed to step 3:
20 goes into 20 1 times with a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 21.0
Subtract 20 from 20 to get 0.
Fetch the next digit (4) from the dividend, attach it to 0 and continue: 4 / 20

Advancing to step 4:
20 goes into 4 0 times with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 210.0
The remainder is 4 after subtracting 0 from 4.
Append the next digit (6) from the dividend to 4 and continue with: 46 / 20

Let's proceed to step 5:
If we divide 46 by 20, we get 2 and a remainder of 6.
Put 2 as the next digit of the answer. 
Result so far: 2102.0
The remainder is 6 after subtracting 40 from 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 6:
The number 20 fits into 60 3 times, leaving a remainder of 0.
The number 3 becomes the next digit in our result. 
Result so far: 2102.3
Deduct 60 from 60 and we're left 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 7:
20 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 2102.3
Deduct 0 from 0 and we're left 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 8:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 2102.3
Deduct 0 from 0 and we're left 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 2102.3 and a remainder of 0.0.