postponement vs protraction

postponement

noun
  • A delay, as a formal delay in a proceeding. 

protraction

noun
  • 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 

  • The act of protracting 

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