Answer:
I can be found in seconds, minutes and centuries, but not in days, years or decades.
It comes only before, it comes only after. Rises only in darkness, but rises only in light. It is always the same, but is yet always different.
Sometimes it's silver but also gold. Printed on paper it's a treasure to hold. What is it?
This is your stomach's way of letting you know you've neglected it.
What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.