I've been working at a company on-call overnights for about 6 months now, of which I've only actually worked with them for 3 months, and during those months only worked less than a week. I'd estimate that my overall experience here is only about 50 hours total.
Since the economy has been slow and they don't need me near as often, I'm considering the usefulness of even listing that I work there on my resume. I'm technically still employed there and on their payroll, so I've been listing it as working 0 hours per week, just to have it there.
Is there any reason to list this job at all, or should I only even mention it to people if they specifically ask for it (like list all your employment in the past n years)? If so, how little is too little for a job to be worthy of appearing on a resume?