Wow major Content patchs - typically 3-4 per year
Patch 8.3.7 July 21, 2020
Patch 8.3.0 January 14, 2020
Patch 8.2.5 September 24, 2019
Patch 8.2.0 June 25, 2019
Patch 8.1.5 March 12, 2019
Hearthstone 16 major patches in 2020 13 that added content to the game for 1 or more aspect of the game - Non subscription based game.
https://playhearthstone.com/en-us/news/patchnotesand your talking about heroes of the storm get your game facts strait heroes of the storm has a discontinued developer staff the entire heroes of the storm staff was gutted in 2019. Which that hasnt had content released in a year because they litterly have a team of 4 people for the entire project. Last character/content patch for it with new content for heroes of the storm was 2019. I was suprised they even released new content for that at all.