Guild Wars 2

I just can’t seem to get the “easy” Hinterlands Liberator trophy. I have hung out in Harathi Hinterlands for over an hour did many repeat events but I can not seem to get either of the two events I need: (Intercept the prisoner caravan or [Group Event] Break the captives out of the centaur slave cage

https://wiki.guildwars2.com/wiki/Hinterlands_Liberator

Suggestions?

After another hour one finally came up., Thanks all

FWIW, doing other events can help bring it forward, and hanging out in the trigger areas seems to help cause them to start. (By “seems”, I mean, it feels like it does, but I have no proof either way.)