false friend vs tergiversator

false friend

noun
  • Used other than figuratively or idiomatically: see false, friend. 

  • A word in a language that bears a deceptive resemblance to a word in another language but in fact has a different meaning. 

tergiversator

noun
  • one who tergiversates 

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