at one time or another
On various separate occasions. For example, At one time or another I've considered replacing the furnace, but so far I haven't done so. [Early 1600s]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.