WoW events: At least one event each week + Sometimes introducing time-limited events that are entire playmodes
GW2 events: Full-fledged seasonal events with recurring rewards and multiple minigames to participate in
ESO events: Do X activity daily to earn tickets and get yourself a nice reward

FFXIV events: A side quest that is mostly: "Blah blah blah blah blah" and only one or two rewards are given at its end. And it can be done in less than 5 minutes.