backbite vs endorse

backbite

verb
  • To attack from behind or when out of earshot with spiteful or defamatory remarks. 

  • To speak badly of an absent individual. 

  • To make spiteful slanderous or defamatory statements about someone. 

noun
  • One who engages in backbiting; a backbiter. 

endorse

noun
  • A diminutive of the pale, usually appearing in pairs on either side of a pale. 

verb
  • To report (a symptom); to describe. 

  • To write one's signature on the back of a cheque, or other negotiable instrument, when transferring it to a third party, or cashing it. 

  • To express support or approval, especially officially or publicly. 

  • To give an endorsement. 

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