certitude vs continuity

certitude

noun
  • Something that is a certainty. 

  • Sureness, certainty. 

continuity

noun
  • The announcements and messages inserted by the broadcaster between programmes. 

  • Lack of interruption or disconnection; the quality of being continuous in space or time. 

  • A characteristic property of a continuous function. 

  • A narrative device in episodic fiction where previous and/or future events in a series of stories are accounted for in present stories. 

  • Consistency between multiple shots depicting the same scene but possibly filmed on different occasions. 

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