evasion vs vagueness

evasion

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

vagueness

noun
  • The condition of being unclear; vague. 

  • Something which is vague, or an instance or example of vagueness. 

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