fudge the issue vs tergiversate

fudge the issue

verb
  • Adopt a solution to a specific problem which does not address the larger, more general problem of which the specific problem is an instance. 

tergiversate

verb
  • To evade, to equivocate using subterfuge; to obfuscate in a deliberate manner. 

  • To flee by turning one's back. 

  • To change sides or affiliation; to apostatize. 

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