caw vs trill

caw

verb
  • To make the harsh cry of a crow, rook, or raven. 

intj
  • A rendering of the vocalisation of a crow or other corvid. 

noun
  • The harsh cry of a crow. 

trill

verb
  • To create a trill sound; to utter trills or a trill; to play or sing in tremulous vibrations of sound; to have a trembling sound; to quaver. 

  • To impart the quality of a trill to; to utter as, or with, a trill. 

adj
  • true, respected 

noun
  • A rapid alternation between an indicated note and the one above it, in musical notation usually indicated with the letters tr written above the staff. 

  • A type of consonantal sound that is produced by vibrations of the tongue against the place of articulation: for example, Spanish ⟨rr⟩, /r/. 

  • A tremulous high-pitched vocal sound produced by cats. 

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