98599980 ÷ 2 
The aim is to understand the frequency of 2 in 98599980.

Let's proceed to step 1:
If we divide 9 by 2, we get 4 and a remainder of 1.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtracting 8 from 9 leaves us with 1.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 2

Step 2:
18 divided by 2 is 9 with a remainder of 0.
Put 9 as the next digit of the answer. 
Result so far: 49.0
If we take 18 away from 18, we end up with 0.
Fetch the next digit (5) from the dividend, attach it to 0 and continue: 5 / 2

Advancing to step 3:
If we divide 5 by 2, we get 2 and a remainder of 1.
The number 2 becomes the next digit in our result. 
Result so far: 492.0
Deduct 4 from 5 and we're left with 1.
Append the next digit (9) from the dividend to 1 and continue with: 19 / 2

Advancing to step 4:
19 divided by 2 is 9 with a remainder of 1.
The next digit of our result is 9. 
Result so far: 4929.0
Deduct 18 from 19 and we're left with 1.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 2

Step 5:
19 divided by 2 is 9 with a remainder of 1.
The next digit of our result is 9. 
Result so far: 49299.0
If we take 18 away from 19, we end up with 1.
Fetch the next digit (9) from the dividend, attach it to 1 and continue: 19 / 2

Moving on to step 6:
19 divided by 2 is 9 with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 492999.0
Subtract 18 from 19 to get 1.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 2

On to step 7:
The number 2 fits into 18 9 times, leaving a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 4929999.0
The remainder is 0 after subtracting 18 from 18.
Take the next digit (0) from the dividend and append it to 0, then repeat: 0 / 2

Advancing to step 8:
The number 2 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 49299990.0
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.

Let's proceed to step 9:
2 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 49299990.0
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.

Step 10:
If we divide 0 by 2, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 49299990.0
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.

After the division, we end up with 49299990.0 and a remainder of 0.0.