1. The highest frequency supported is one per day, as in MS Outlook.

2. See following code sample:

//  Create an AppointmentRecurrence  instance.
AppointmentRecurrence recurrence = new AppointmentRecurrence();

//  Set the PatternFrequency to Daily to generate an occurrence every day.
recurrence.PatternFrequency = RecurrencePatternFrequency.Daily;

//  Set the OccurrenceStartTime and OccurrenceDuration such that
//  the resulting appointment occur at 9AM , with a duration of
//  30 minutes.
recurrence.OccurrenceStartTime = DateTime.Today.AddHours( 9 );
recurrence.OccurrenceDuration = TimeSpan.FromMinutes( 30 );

//  Add an Appointment and assign the recurrence
Appointment appointment = this.dayView.CalendarInfo.Appointments.Add( DateTime.Today, "Recurrence" );
appointment.Recurrence = recurrence;