Let's divide 686566 by 20
The aim is to understand the frequency of 20 in 686566.

Advancing to step 1:
The number 20 fits into 6 0 times, leaving a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Grab the next digit (8) from the dividend, add it to 6, then carry on: 68 / 20

Going ahead to step 2:
68 divided by 20 is 3 with a remainder of 8.
The next digit of our result is 3. 
Result so far: 3.0
The remainder is 8 after subtracting 60 from 68.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 20

Going ahead to step 3:
20 can be fit into 86 4 times, resulting in a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 34.0
If we subtract 80 from 86, we get 6.
Include the next digit (5) from the dividend after 6, then repeat: 65 / 20

Let's proceed to step 4:
The number 20 fits into 65 3 times, leaving a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 343.0
The remainder is 5 after subtracting 60 from 65.
Grab the next digit (6) from the dividend, add it to 5, then carry on: 56 / 20

Moving on to step 5:
20 goes into 56 2 times with a remainder of 16.
The number 2 becomes the next digit in our result. 
Result so far: 3432.0
If we subtract 40 from 56, we get 16.
Append the next digit (6) from the dividend to 16 and continue with: 166 / 20

Advancing to step 6:
The number 20 fits into 166 8 times, leaving a remainder of 6.
The number 8 becomes the next digit in our result. 
Result so far: 34328.0
The remainder is 6 after subtracting 160 from 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 7:
60 divided by 20 is 3 with a remainder of 0.
The next digit of our result is 3. 
Result so far: 34328.3
Deduct 60 from 60 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.

Moving on to step 8:
20 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 34328.3
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.

Step 9:
The number 20 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 34328.3
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 quotient of the division is 34328.3, and the remainder is 0.0.