It can refer to:
* Schedules for transportation: like train schedules, bus schedules, or flight schedules.
* Schedules for events: like opening hours of a store, the schedule of a conference, or the schedule of a school.
* Schedules for work: like the work schedule of an employee, the schedule of meetings, or the schedule of classes.
It is a very common word in French and you will see it used in a variety of contexts.