236018 ÷ 20 
The aim is to understand the frequency of 20 in 236018.

Step 1:
20 can be fit into 2 0 times, resulting in a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Bring next digit (3) of the dividend behind the 2 and repeat the process: 23 / 20

Let's proceed to step 2:
If we divide 23 by 20, we get 1 and a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 3 after subtracting 20 from 23.
Fetch the next digit (6) from the dividend, attach it to 3 and continue: 36 / 20

Advancing to step 3:
36 divided by 20 is 1 with a remainder of 16.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
If we take 20 away from 36, we end up with 16.
Include the next digit (0) from the dividend after 16, then repeat: 160 / 20

Step 4:
20 goes into 160 8 times with a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 118.0
If we subtract 160 from 160, we get 0.
Append the next digit (1) from the dividend to 0 and continue with: 1 / 20

Going ahead to step 5:
If we divide 1 by 20, we get 0 and a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 1180.0
If we take 0 away from 1, we end up with 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 20

Let's proceed to step 6:
20 goes into 18 0 times with a remainder of 18.
Use 0 as the next digit of our solution. 
Result so far: 11800.0
If we take 0 away from 18, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 7:
When dividing 180 by 20, we get 9 with a remainder of 0.
The next digit of our result is 9. 
Result so far: 11800.9
Subtract 180 from 180 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.

Advancing to step 8:
20 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 11800.9
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 9:
20 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 11800.9
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.

The final result is 11800.9 with a remainder of 0.0.