The syntax of iCalendar repeat strings (on which the OF 1.10 repetition model is now based) includes the UNTIL and COUNT keywords as well as the FREQ keyword which is already in (Sneaky peek) use with repetitions like:

FREQ=WEEKLY;INTERVAL=2;BYDAY=MO,WE;WKST=SU

I'm not sure whether they are internally parsed yet, but it strikes me that it might well be useful to be able to use these keywords, and have a GUI component offering:

• Repeat <at some interval> UNTIL <date>
• Repeat <N> times <at some interval>

(Repeat Tuesday lecture until end of term/semester,
repeat some exercise/medicine daily for 10 days etc)

Not sure whether that looks useful to others ...

--