Answer:
I can be found in seconds, minutes and centuries, but not in days, years or decades.
A person's greatest asset.
The line a runner strives to reach
It can be cracked, It can be made, It can be told, it can be played. What is it?
The part of the bird, that is not in the sky, Which can swim in the ocean and always stay dry. What is it?
What never gets any wetter no matter how hard it rains?