i think it's only configurable in global level now
event config modify -duplicate-suppression-duration ?
<integer> Duration in seconds for suppression of identical messages
but. you can exclude the rest of the events/events-to-restorations with:
event config modify -auto-suppress-exempt-filter
Just for the sake of anyone coming here by mistake.
the alternatives for "event route" are "event destination",""event filter" and "event filter rule"