outset vs preface

outset

noun
  • Onset; the beginning or initial stage of something. 

verb
  • To cause (a design element) to extend around the outside of something else, the opposite of being inset. 

preface

noun
  • The beginning or introductory portion that comes before the main text of a document or book. 

  • An introduction, or series of preliminary remarks. 

  • A title or epithet. 

  • The prelude or introduction to the canon of the Mass. 

verb
  • To give a preface to. 

  • To introduce or make a comment before (the main point). 

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