We're dividing 42803 by 2 
The aim is to understand the frequency of 2 in 42803.

Advancing to step 1:
When dividing 4 by 2, we get 2 with a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtract 4 from 4 to get 0.
Include the next digit (2) from the dividend after 0, then repeat: 2 / 2

On to step 2:
2 goes into 2 1 times with a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 21.0
If we take 2 away from 2, we end up with 0.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 2

Moving on to step 3:
The number 2 fits into 8 4 times, leaving a remainder of 0.
The number 4 becomes the next digit in our result. 
Result so far: 214.0
Subtract 8 from 8 to get 0.
Take the next digit (0) from the dividend and append it to 0, then repeat: 0 / 2

Moving on to step 4:
When dividing 0 by 2, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 2140.0
If we subtract 0 from 0, we get 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 2

Moving on to step 5:
2 goes into 3 1 times with a remainder of 1.
Record the quotient 1 as the next digit in the result. 
Result so far: 21401.0
If we take 2 away from 3, 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.

Advancing to step 6:
2 can be fit into 10 5 times, resulting in a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 21401.5
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.

On to step 7:
The number 2 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 21401.5
Deduct 0 from 0 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.

Advancing to step 8:
2 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 21401.5
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 21401.5 and a remainder of 0.0.