coda vs prologue

coda

noun
  • The optional final part of a syllable, placed after its nucleus, and usually composed of one or more consonants. 

  • In seismograms, the gradual return to baseline after a seismic event. The length of the coda can be used to estimate event magnitude, and the shape sometimes reveals details of subsurface structures. 

  • A conclusion (of a statement or event, for example), final portion, tail end. 

  • A passage that brings a movement or piece to a conclusion through prolongation. 

prologue

verb
  • To introduce with a formal preface, or prologue. 

noun
  • A speech or section used as an introduction, especially to a play or novel. 

  • A component of a computer program that prepares the computer to execute a routine. 

  • One who delivers a prologue. 

  • An individual time trial before a stage race, used to determine which rider wears the leader's jersey on the first stage. 

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