It varies store to store. Depends what time you receive your delivery and how frequently you get them. Smaller stores may offer a smaller contract with only 2 deliveries. Larger stores may ask you to work 5 days a week as they have more stock to process. Shifts can start at any time and end at any time. Completely depends on the store.
The trial shift was a nice introduction to the company and the team members that I would be working with. I literally had a trial doing exactly what I would do when employed but I was welcomed in a way in which I felt confident to ask for help.
I was on the sales floor for an hour and in the stockroom for an hour, which was great as it opened the chance for me to work in both areas and pick up extra shifts.