We look at the division of 80209501 by 2 
The aim is to understand the frequency of 2 in 80209501.

Let's proceed 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 take 8 away from 8, we end up with 0.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 2

Moving on to step 2:
2 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 40.0
Deduct 0 from 0 and we're left with 0.
Grab the next digit (2) from the dividend, add it to 0, then carry on: 2 / 2

Advancing to step 3:
If we divide 2 by 2, we get 1 and a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 401.0
Subtract 2 from 2 to get 0.
Include the next digit (0) from the dividend after 0, then repeat: 0 / 2

Step 4:
When dividing 0 by 2, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 4010.0
Deduct 0 from 0 and we're left with 0.
Take the next digit (9) from the dividend and append it to 0, then repeat: 9 / 2

Advancing to step 5:
If we divide 9 by 2, we get 4 and a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 40104.0
If we take 8 away from 9, we end up with 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 2

Advancing to step 6:
15 divided by 2 is 7 with a remainder of 1.
Put 7 as the next digit of the answer. 
Result so far: 401047.0
Deduct 14 from 15 and we're left with 1.
Fetch the next digit (0) from the dividend, attach it to 1 and continue: 10 / 2

Step 7:
When dividing 10 by 2, we get 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 4010475.0
Subtract 10 from 10 to get 0.
Bring next digit (1) of the dividend behind the 0 and repeat the process: 1 / 2

Advancing to step 8:
When dividing 1 by 2, we get 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 40104750.0
If we take 0 away from 1, 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 9:
If we divide 10 by 2, we get 5 and a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 40104750.5
If we take 10 away from 10, 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.

Let's proceed to step 10:
If we divide 0 by 2, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 40104750.5
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.

Let's proceed to step 11:
2 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 40104750.5
Subtract 0 from 0 to 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.

The final outcome is 40104750.5, with a leftover of 0.0.