manes vs revenant

manes

noun
  • The souls or spirits of dead ancestors, conceived as deities or the subjects of reverence, or of other deceased relatives. 

revenant

noun
  • A supernatural being that returns from the dead; a zombie or ghost. 

  • A person or thing reborn. 

  • Someone who returns from a long absence. 

adj
  • Returning. 

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