I am generous with my time.

The hardest time to give is the kind with no task in it. Helping someone shift furniture is straightforward. You lift things, you finish, you have been useful.

Sitting in a hospital corridor for three hours while somebody's mother is in surgery has no output at all. You do nothing. You are simply there, and being there turns out to be the entire contribution.

Most of us prefer the version with a job attached, because a job protects you from awkwardness. Generosity with time often means giving up that protection and staying anyway.