parrot vs thrasher

parrot

noun
  • A kind of bird, many species of which are colorful and able to mimic human speech, of the order Psittaciformes or (narrowly) of the family Psittacidae. 

  • A transponder. 

  • A parroter; a person who repeats the words or ideas of others. 

verb
  • To repeat (exactly what has just been said) without necessarily showing understanding, in the manner of a parrot. 

thrasher

noun
  • Any of several New World passerine songbirds, of the genera Toxostoma, Allenia, Margarops, Oreoscoptes and Ramphocinclus in the family Mimidae, that have a long, downward-curved beak. 

  • A fan of thrash metal music. 

  • A thresher shark. 

  • One who thrashes. 

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