backstory vs lore

backstory

noun
  • A fictitious account of a person's history designed to conceal their actual history and motives. 

  • The previous life and experiences of a person, especially a character in a dramatic work, but also a real-life person. 

  • A prequel. 

lore

noun
  • The backstory created around a fictional universe. 

  • The anterior portion of the cheeks of insects. 

  • The region between the eyes and nostrils of birds, reptiles, and amphibians. 

  • All the facts and traditions about a particular subject that have been accumulated over time through education or experience. 

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