main features vs recapitulation

main features

recapitulation

noun
  • A subsequent brief recitement or enumeration of the major points in a narrative, article, or book. 

  • The third major section of a musical movement written in sonata form, representing thematic material that originally appeared in the exposition section. 

  • The symmetry provided by Christ's life to the teachings of the Old Testament; the summation of human experience in Jesus Christ. 

  • The reenactment of the embryonic development in evolution of the species. 

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