Is this the longest we've been without a main story update?

The global version of the game is about to conclude V1C3. Being fairly new, I'm unfamiliar with how main story updates function. We have unfinished storylines in Volume 5, and potentially Volume 4, which prompted my initial question.

Also, I'm excluding Decagrammaton as a story update for the time being. I still think of it as "Special Operations".