logbook vs travelogue

logbook

noun
  • A book in which events are recorded; a journal, especially of travel. 

  • A book in which measurements from the ship's log are recorded, along with other salient details of the voyage. 

  • A record of the ownership, and licensing of a motor car 

travelogue

noun
  • A description of someone's travels, given in the form of narrative, public lecture, slide show or motion picture. 

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