Let's divide 335983 by 20
The aim is to understand the frequency of 20 in 335983.

Moving on to step 1:
20 goes into 3 0 times with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Grab the next digit (3) from the dividend, add it to 3, then carry on: 33 / 20

Let's proceed to step 2:
The number 20 fits into 33 1 times, leaving a remainder of 13.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 20 from 33, we get 13.
Grab the next digit (5) from the dividend, add it to 13, then carry on: 135 / 20

Going ahead to step 3:
135 divided by 20 is 6 with a remainder of 15.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
If we take 120 away from 135, we end up with 15.
Bring next digit (9) of the dividend behind the 15 and repeat the process: 159 / 20

Going ahead to step 4:
The number 20 fits into 159 7 times, leaving a remainder of 19.
Put 7 as the next digit of the answer. 
Result so far: 167.0
If we take 140 away from 159, we end up with 19.
Bring next digit (8) of the dividend behind the 19 and repeat the process: 198 / 20

Moving on to step 5:
20 can be fit into 198 9 times, resulting in a remainder of 18.
Record the quotient 9 as the next digit in the result. 
Result so far: 1679.0
Subtracting 180 from 198 leaves us with 18.
Bring next digit (3) of the dividend behind the 18 and repeat the process: 183 / 20

On to step 6:
The number 20 fits into 183 9 times, leaving a remainder of 3.
Use 9 as the next digit of our solution. 
Result so far: 16799.0
The remainder is 3 after subtracting 180 from 183.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 7:
30 divided by 20 is 1 with a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 16799.1
Deduct 20 from 30 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
The number 20 fits into 100 5 times, leaving a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 16799.15
If we take 100 away from 100, 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 9:
If we divide 0 by 20, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 16799.15
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.

Step 10:
20 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 16799.15
If we take 0 away from 0, 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.

The final outcome is 16799.15, with a leftover of 0.0.