Part-time jobs that fit around childcare

A cleaning company is taking applications for evening crews. There are 11 people counting on me, so I am trying to be careful. They can give a schedule two weeks ahead. How many hours do they guarantee?

I worked evenings at a hotel. The hours were steady and the team was friendly, but weekends were busy.

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