pullus vs raptor

pullus

noun
  • A chick; a young bird in the downy stage. 

raptor

noun
  • A bird of prey. 

  • One of the dromaeosaurs, a family of carnivorous dinosaurs having tearing claws on the hind legs. 

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