churr vs kibitz

churr

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

noun
  • A low vocal sound made by some birds. 

kibitz

verb
  • To make small talk or idle chatter. 

  • To watch a card or board game. 

  • To give unsolicited or unwanted advice or make unhelpful or idle comments, especially to someone playing a game. 

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