fowl vs passeriform

fowl

noun
  • A bird of the order Galliformes, including chickens, turkeys, pheasant, partridges and quail. 

  • Birds which are hunted or kept for food, including Galliformes and also waterfowl of the order Anseriformes such as ducks, geese and swans, together forming the clade Galloanserae. 

verb
  • To hunt fowl. 

passeriform

noun
  • Any bird of the order Passeriformes. 

adj
  • Of or pertaining to a sparrow; sparrow-like; bird-like. 

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