churr vs sizzle

churr

verb
  • To make the low vocal sound of some birds. 

noun
  • A low vocal sound made by some birds. 

sizzle

verb
  • To cook (something) in a manner which causes that sound. 

  • To make the sound of water boiling on a hot surface. 

  • To be exciting or dazzling. 

noun
  • Zing, zip, or pizazz; excitement. 

  • The process of being cooked which involves that sound. 

  • The sound of water boiling on a hot surface. 

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