continuance vs protraction

continuance

noun
  • The action of continuing. 

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

protraction

noun
  • The act of protracting 

  • The condition of being protracted 

  • The act of making a plot on paper. 

  • The lengthening of a short syllable 

  • An anterior movement on the horizontal plane; The forward movement of the tongue or of a limb 

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