be content vs yammer

be content

yammer

noun
  • A loud noise. 

  • One who yammers. 

  • The act or noise of yammering. 

verb
  • To complain peevishly. 

  • To repeat on and on, usually loudly or in complaint. 

  • To make an outcry; to clamor. 

  • To talk loudly and persistently. 

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