Help on events

[Hok]

I'm trying to create a permanent event which fires every X time units.

I tryed to use this trigger types passing as parameter X:

1) Time Elapsed
2) Status Game Date After Date

Neither works. Both of them ask for a stardate so I can't tell which value could work to have the event trigger *every* X time units.

If you can resolve this problem I could come up with a Fuel Mod in a few days.

Thanks.