mouth off vs quibble

mouth off

verb
  • To complain or otherwise express oneself in a loud, immoderate manner. 

  • To talk impudently, especially to one's superior. 

quibble

verb
  • To complain or argue in a trivial or petty manner. 

  • To contest, especially some trivial issue in a petty manner. 

noun
  • An objection or argument based on an ambiguity of wording or similar trivial circumstance; a minor complaint. 

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