We look at the division of 851210 by 2 
The aim is to understand the frequency of 2 in 851210.

Going ahead to step 1:
If we divide 8 by 2, we get 4 and a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we subtract 8 from 8, we get 0.
Include the next digit (5) from the dividend after 0, then repeat: 5 / 2

Step 2:
The number 2 fits into 5 2 times, leaving a remainder of 1.
Write down 2 as next digit of the result. 
Result so far: 42.0
Subtracting 4 from 5 leaves us with 1.
Include the next digit (1) from the dividend after 1, then repeat: 11 / 2

Let's proceed to step 3:
The number 2 fits into 11 5 times, leaving a remainder of 1.
The next digit of our result is 5. 
Result so far: 425.0
If we subtract 10 from 11, we get 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 2

Advancing to step 4:
When dividing 12 by 2, we get 6 with a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 4256.0
The remainder is 0 after subtracting 12 from 12.
Include the next digit (1) from the dividend after 0, then repeat: 1 / 2

Step 5:
When dividing 1 by 2, we get 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 42560.0
If we take 0 away from 1, 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 6:
When dividing 10 by 2, we get 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 425605.0
The remainder is 0 after subtracting 10 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 7:
If we divide 0 by 2, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 425605.0
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.

On to step 8:
2 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 425605.0
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.

Our division results in 425605.0 with a remaining 0.0.