Part-time jobs that fit around childcare (Memphis)

A cleaning company is taking applications for evening crews. I have read a lot of threads here and could not find my exact situation. They can give a schedule two weeks ahead. How many hours do they guarantee?

Ask whether the schedule is posted in advance and how they handle swaps. It matters a lot with kids.

I got the job by going in around mid-morning and asking for the manager. Worth a try.