ambiguity vs evasion

ambiguity

noun
  • The state of being ambiguous. 

  • words or statements that are open to more than one interpretation, explanation or meaning, especially if that meaning cannot be determined from its context. 

evasion

noun
  • The act of eluding or evading or avoiding, particularly the pressure of an argument, accusation, charge, or interrogation; artful means of eluding. 

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