lore vs mythus

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. 

mythus

noun
  • Synonym of mythos. 

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