368538 ÷ 20 
The aim is to understand the frequency of 20 in 368538.

Advancing to step 1:
If we divide 3 by 20, we get 0 and a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Fetch the next digit (6) from the dividend, attach it to 3 and continue: 36 / 20

Moving on to step 2:
The number 20 fits into 36 1 times, leaving a remainder of 16.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 20 from 36, we get 16.
Append the next digit (8) from the dividend to 16 and continue with: 168 / 20

On to step 3:
When dividing 168 by 20, we get 8 with a remainder of 8.
Put 8 as the next digit of the answer. 
Result so far: 18.0
Subtract 160 from 168 to get 8.
Append the next digit (5) from the dividend to 8 and continue with: 85 / 20

Step 4:
20 can be fit into 85 4 times, resulting in a remainder of 5.
Put 4 as the next digit of the answer. 
Result so far: 184.0
Subtracting 80 from 85 leaves us with 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 20

Advancing to step 5:
The number 20 fits into 53 2 times, leaving a remainder of 13.
Put 2 as the next digit of the answer. 
Result so far: 1842.0
Subtracting 40 from 53 leaves us with 13.
Include the next digit (8) from the dividend after 13, then repeat: 138 / 20

Going ahead to step 6:
The number 20 fits into 138 6 times, leaving a remainder of 18.
Write down 6 as next digit of the result. 
Result so far: 18426.0
Subtracting 120 from 138 leaves us 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.

On to step 7:
The number 20 fits into 180 9 times, leaving a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 18426.9
The remainder is 0 after subtracting 180 from 180.
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:
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: 18426.9
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.

Moving on to step 9:
When dividing 0 by 20, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 18426.9
If we subtract 0 from 0, we 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.

After the division, we end up with 18426.9 and a remainder of 0.0.