lich vs reliquiae

lich

noun
  • A reanimated corpse or undead being, particularly a still-intelligent undead spellcaster. 

reliquiae

noun
  • Remains, especially of fossil organisms. 

  • Artifacts; things made or modified by human art. 

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