beg the question vs tergiverse

beg the question

verb
  • To sidestep or fail to address a question. 

  • To raise or prompt a question. 

  • To engage in the logical fallacy of begging the question (petitio principii). 

tergiverse

verb
  • Synonym of tergiversate 

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