green woodpecker vs psittacine

green woodpecker

noun

  • A European bird, Picus viridis. 

psittacine

noun

  • Any bird in the order Psittaciformes: a parrot. 

adj

  • Of or pertaining to parrots. 

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