663461 ÷ 20 
The aim is to understand the frequency of 20 in 663461.

Let's proceed to step 1:
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: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 20

Advancing to step 2:
66 divided by 20 is 3 with a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we subtract 60 from 66, we get 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 20

Let's proceed to step 3:
If we divide 63 by 20, we get 3 and a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 33.0
Subtract 60 from 63 to get 3.
Include the next digit (4) from the dividend after 3, then repeat: 34 / 20

Let's proceed to step 4:
The number 20 fits into 34 1 times, leaving a remainder of 14.
Put 1 as the next digit of the answer. 
Result so far: 331.0
Subtracting 20 from 34 leaves us with 14.
Fetch the next digit (6) from the dividend, attach it to 14 and continue: 146 / 20

Moving on to step 5:
146 divided by 20 is 7 with a remainder of 6.
The number 7 becomes the next digit in our result. 
Result so far: 3317.0
If we take 140 away from 146, we end up with 6.
Append the next digit (1) from the dividend to 6 and continue with: 61 / 20

Moving on to step 6:
The number 20 fits into 61 3 times, leaving a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 33173.0
If we take 60 away from 61, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 7:
20 can be fit into 10 0 times, resulting in a remainder of 10.
The next digit of our result is 0. 
Result so far: 33173.0
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 8:
100 divided by 20 is 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 33173.05
The remainder is 0 after subtracting 100 from 100.
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:
20 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 33173.05
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.

Going ahead to step 10:
0 divided by 20 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 33173.05
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.

Our division results in 33173.05 with a remaining 0.0.