continuance vs perseverance

continuance

noun
  • The action of continuing. 

  • An order issued by a court granting a postponement of a legal proceeding for a set period. 

perseverance

noun
  • Continuing in a course of action without regard to discouragement, opposition or previous failure. 

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