How often do 4x Character XP events generally happen?

Unfortunately I missed the 4x CXP a few weeks ago. I only need to get all classes to 20 for Seriously 5.0 Chapter 2. I’m wondering if I should just grind it out with only the double XP from boost or wait for the next 4x CXP event. Was the event a few weeks ago the first time there has been 4x CXP? Regular XP isn’t relevant to me as I’m already at re-up 50.

Dont wait, these events are very rare.

Shauny hinted at a big xp event on the horizons. 2 year anniversary for this game is coming soon as well as gears of war anniversary so if TC cares at all, i’m sure something is coming.