rara avis vs stunner

rara avis

noun
  • A rare or unique, and thus outstanding or unusual, person or thing; a rare bird. 

  • A rare species or type of bird. 

stunner

noun
  • Anything that is stunning. 

  • A person or machine that stuns an animal before slaughter. 

  • A woman of stunning beauty (often hyperbolically), a knockout. 

  • A professional wrestling maneuver in which an attacking wrestler applies a facelock to an opponent and falls to a seated position, forcing the opponent's jaw or neck to drop on the attacker's shoulder. 

  • A pistol firing a beam capable of stunning an enemy. 

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