Answer:
What comes once in a minute, twice in a moment, but never in a thousand years?
What is full of holes but still holds water
You will find me with four legs, but no hair. People ride me for hours, but I don't go anywhere without needing to be tugged. Jerked or turned on, I always manage to be ready for work.
By Moon or by Sun, I shall be found. Yet I am undone, if there's no light around.
During the 1800's these turned women into hourglasses and is becoming more popular again these days
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.