AI vs NPC

AI

noun
  • A character or entity controlled by the game instead of a player. 

NPC

noun
  • A person with no ability to think for themselves; a sheeple (originally referring to opponents of former US President Donald Trump). 

verb
  • To act as an NPC (“non-player character”) in a game. 

How often have the words AI and NPC occurred in a corpus of books? (source: Google Ngram Viewer )