600665 divided by 20 
The aim is to understand the frequency of 20 in 600665.

Going ahead to step 1:
20 can be fit into 6 0 times, resulting in a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (0) from the dividend, add it to 6, then carry on: 60 / 20

On to step 2:
20 goes into 60 3 times with a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Deduct 60 from 60 and we're left with 0.
Include the next digit (0) from the dividend after 0, then repeat: 0 / 20

Step 3:
20 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 30.0
Subtracting 0 from 0 leaves us with 0.
Grab the next digit (6) from the dividend, add it to 0, then carry on: 6 / 20

On to step 4:
20 can be fit into 6 0 times, resulting in a remainder of 6.
The next digit of our result is 0. 
Result so far: 300.0
If we take 0 away from 6, we end up with 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 20

Going ahead to step 5:
20 goes into 66 3 times with a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 3003.0
If we take 60 away from 66, we end up with 6.
Grab the next digit (5) from the dividend, add it to 6, then carry on: 65 / 20

Moving on to step 6:
The number 20 fits into 65 3 times, leaving a remainder of 5.
Record the quotient 3 as the next digit in the result. 
Result so far: 30033.0
If we subtract 60 from 65, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 7:
If we divide 50 by 20, we get 2 and a remainder of 10.
Put 2 as the next digit of the answer. 
Result so far: 30033.2
The remainder is 10 after subtracting 40 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 8:
20 can be fit into 100 5 times, resulting in a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 30033.25
Subtracting 100 from 100 leaves us 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:
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: 30033.25
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.

Going ahead to step 10:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 30033.25
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 30033.25 with a remainder of 0.0.