birdcall vs halloo

birdcall

noun
  • An imitation of this cry. 

  • Any vocalisation of a bird. 

  • A device used to imitate this cry, so as to lure and catch birds. 

verb
  • To imitate the cry of a bird. 

halloo

noun
  • A shout of halloo. 

verb
  • To shout halloo. 

  • To encourage with shouts; to egg (someone) on. 

  • To shout (something). 

  • To chase with shouts or outcries. 

  • To call or shout to; to hail. 

intj
  • Used to greet someone, or to catch their attention. 

  • Used in hunting to urge on the pursuers. 

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