The javadoc of @IntervalDuration says
The interval between occurrences of a repeating asynchronous call.
Umpf. Seconds? Milliseconds?
The docs aren't helpful either.
I think seam users should not be forced to use trial-and-error here.
I also checked the source code, but had to follow the trail to the quartz sources (SimpleTrigger) where some nice javadoc says
@param repeatInterval
The number of milliseconds to pause between the repeat firing.
I just hope that I haven't overlooked some intermediate scaling.