chirl vs veer

chirl

verb
  • To emit a low sound; to warble. 

noun
  • A kind of musical warble. 

veer

verb
  • To change direction or course suddenly; to swerve. 

  • To shift in a clockwise direction (if in the Northern Hemisphere, or in a counterclockwise direction if in the Southern Hemisphere). 

  • To shift aft. 

  • To change direction into the wind; to wear ship. 

  • To turn. 

noun
  • A turn or swerve; an instance of veering. 

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