accountable vs unanswerable

accountable

adj
  • Obliged, when called upon, to answer (for one’s deeds); answerable. 

  • Liable to be called on to render an account. 

  • Capable of being accounted for; explicable; explainable. 

  • Obliged to keep accurate records (of property or funds). 

unanswerable

noun
  • Something that cannot be answered. 

adj
  • Impossible to dispute or rebut; irrefutable; conclusive. 

  • Not answerable; impossible to answer. 

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