We're dividing 669801 by 20 
The aim is to understand the frequency of 20 in 669801.

Step 1:
6 divided by 20 is 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 20

Moving on to step 2:
20 can be fit into 66 3 times, resulting in a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we take 60 away from 66, we end up with 6.
Fetch the next digit (9) from the dividend, attach it to 6 and continue: 69 / 20

On to step 3:
The number 20 fits into 69 3 times, leaving a remainder of 9.
The next digit of our result is 3. 
Result so far: 33.0
If we subtract 60 from 69, we get 9.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 20

Let's proceed to step 4:
20 can be fit into 98 4 times, resulting in a remainder of 18.
Record the quotient 4 as the next digit in the result. 
Result so far: 334.0
If we subtract 80 from 98, we get 18.
Grab the next digit (0) from the dividend, add it to 18, then carry on: 180 / 20

Step 5:
20 goes into 180 9 times with a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 3349.0
Subtract 180 from 180 to get 0.
Take the next digit (1) from the dividend and append it to 0, then repeat: 1 / 20

Going ahead to step 6:
If we divide 1 by 20, we get 0 and a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 33490.0
Subtracting 0 from 1 leaves us 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.

Let's proceed to step 7:
20 goes into 10 0 times with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 33490.0
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.

On to step 8:
20 can be fit into 100 5 times, resulting in a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 33490.05
Deduct 100 from 100 and we're left 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.

Let's proceed to step 9:
20 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 33490.05
Subtracting 0 from 0 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.

Let's proceed to step 10:
If we divide 0 by 20, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 33490.05
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.

Our division results in 33490.05 with a remaining 0.0.