I used both @least 3 times a year. The plunger maybe more often, since Chipotle is the bomb.
My ladder for Light bulbs for my vaulted ceilings, Christmas lights, smoke detectors, hanging shit, and other various things.
Although the plunger only has one use, I would still have to vote it as having much more significant importance. Clogged toilets, especially if you have visitors, suck.