We look at the division of 142085 by 20 
The aim is to understand the frequency of 20 in 142085.

Moving on to step 1:
If we divide 1 by 20, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (4) from the dividend, attach it to 1 and continue: 14 / 20

Moving on to step 2:
20 goes into 14 0 times with a remainder of 14.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 14 to get 14.
Include the next digit (2) from the dividend after 14, then repeat: 142 / 20

Moving on to step 3:
20 can be fit into 142 7 times, resulting in a remainder of 2.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
If we subtract 140 from 142, we get 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 20

Step 4:
The number 20 fits into 20 1 times, leaving a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 71.0
Subtract 20 from 20 to get 0.
Include the next digit (8) from the dividend after 0, then repeat: 8 / 20

Going ahead to step 5:
If we divide 8 by 20, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 710.0
Deduct 0 from 8 and we're left with 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 20

On to step 6:
20 goes into 85 4 times with a remainder of 5.
The next digit of our result is 4. 
Result so far: 7104.0
Subtracting 80 from 85 leaves us 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:
When dividing 50 by 20, we get 2 with a remainder of 10.
The next digit of our result is 2. 
Result so far: 7104.2
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.

On to step 8:
The number 20 fits into 100 5 times, leaving a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 7104.25
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:
20 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 7104.25
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.

Going ahead to step 10:
When dividing 0 by 20, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 7104.25
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 7104.25 and a remainder of 0.0.