Like, forever!
I believe the answer is:
eons
(Other definitions for eons that I've seen before include "Endless periods" , "Divisions of archaeological time" , "Vast ages" , "Very long periods (US)" , "Divisions of geological time" .)
I believe the answer is:
eons
(Other definitions for eons that I've seen before include "Endless periods" , "Divisions of archaeological time" , "Vast ages" , "Very long periods (US)" , "Divisions of geological time" .)