Let's divide 673011 by 20
The aim is to understand the frequency of 20 in 673011.

Going ahead to step 1:
If we divide 6 by 20, we get 0 and a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Include the next digit (7) from the dividend after 6, then repeat: 67 / 20

Step 2:
If we divide 67 by 20, we get 3 and a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtracting 60 from 67 leaves us with 7.
Fetch the next digit (3) from the dividend, attach it to 7 and continue: 73 / 20

On to step 3:
When dividing 73 by 20, we get 3 with a remainder of 13.
Write down 3 as next digit of the result. 
Result so far: 33.0
If we subtract 60 from 73, we get 13.
Fetch the next digit (0) from the dividend, attach it to 13 and continue: 130 / 20

Advancing to step 4:
The number 20 fits into 130 6 times, leaving a remainder of 10.
The next digit of our result is 6. 
Result so far: 336.0
Subtracting 120 from 130 leaves us with 10.
Append the next digit (1) from the dividend to 10 and continue with: 101 / 20

On to step 5:
101 divided by 20 is 5 with a remainder of 1.
Record the quotient 5 as the next digit in the result. 
Result so far: 3365.0
Deduct 100 from 101 and we're left with 1.
Take the next digit (1) from the dividend and append it to 1, then repeat: 11 / 20

Step 6:
20 can be fit into 11 0 times, resulting in a remainder of 11.
Put 0 as the next digit of the answer. 
Result so far: 33650.0
If we take 0 away from 11, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 7:
If we divide 110 by 20, we get 5 and a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 33650.5
Deduct 100 from 110 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.

Step 8:
20 goes into 100 5 times with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 33650.55
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.

The final outcome is 33650.55, with a leftover of 0.0.