chirrup vs stridulate

chirrup

verb
  • To make a series of chirps, clicks, or clucks. 

  • To express by chirping. 

  • To quicken or animate by chirping. 

noun
  • A brief, high-pitched, insignificant statement. 

  • A series of chirps, clicks or clucks. 

stridulate

verb
  • To make a high-pitched chirping, grating, hissing, or squeaking sound, as male crickets and grasshoppers do, by rubbing certain body parts together. 

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