Expansion/Updates Timeline?

[RaideDuku]

No set timeline, but as you say, expansions (X.0) are about every 2 years. Major content patches (like 5.X) are usually every 4 months. Minor patches (usually contain a small amount of content, and bug/balance fixes, and are like 5.0X) are usually two weeks after a major content patch launch, 2 weeks after that, and then as needed. There are usually about 5-6 minor patches during a major patch cycle, and 5 major patches during an expansion cycle.

Again, this isn't set in stone, and the times above are approximate, but I can only think of one time it was more then just a couple weeks off one way or the other, and that was in between the last content patch of ARR and Heavensward, where it was like, 6 months between 2.5 and 3.0.