I have the following entity

public class Employee
{
   public virtual int Id {get;set;}
   public virtual ISet<Hour> XboxBreakHours{get;set}
   public virtual ISet<Hour> CoffeeBreakHours {get;set}
}

public class Hour
{
   public DateTime Time {get;set;}
}

(What I want to do here is store information that employee A plays Xbox everyday let's say at 9:00 13:30 and has a coffee break everyday at 7:00 12:30 18:00) - I am not sure if my approach is valid at all here.

The question is how should my (ideally fluent) mappings look like here? It is not necessary (from my point of view) for Hour class to have Id or be accessible from some kind of repository.