Let's divide 63909 by 2
The aim is to understand the frequency of 2 in 63909.

Step 1:
2 goes into 6 3 times with a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we take 6 away from 6, we end up with 0.
Fetch the next digit (3) from the dividend, attach it to 0 and continue: 3 / 2

On to step 2:
When dividing 3 by 2, we get 1 with a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 31.0
The remainder is 1 after subtracting 2 from 3.
Grab the next digit (9) from the dividend, add it to 1, then carry on: 19 / 2

On to step 3:
2 can be fit into 19 9 times, resulting in a remainder of 1.
The next digit of our result is 9. 
Result so far: 319.0
If we take 18 away from 19, we end up with 1.
Take the next digit (0) from the dividend and append it to 1, then repeat: 10 / 2

On to step 4:
2 goes into 10 5 times with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 3195.0
If we subtract 10 from 10, we get 0.
Fetch the next digit (9) from the dividend, attach it to 0 and continue: 9 / 2

Moving on to step 5:
If we divide 9 by 2, we get 4 and a remainder of 1.
The next digit of our result is 4. 
Result so far: 31954.0
Subtracting 8 from 9 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.

Advancing to step 6:
10 divided by 2 is 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 31954.5
If we subtract 10 from 10, 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.

Going ahead to step 7:
If we divide 0 by 2, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 31954.5
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.

Advancing to step 8:
If we divide 0 by 2, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 31954.5
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.

After the division, we end up with 31954.5 and a remainder of 0.0.