guide book vs travelogue

guide book

noun
  • A book that provides guidance, but especially one designed for travellers which provides local tourist information about a particular country or area. 

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 guide book and travelogue occurred in a corpus of books? (source: Google Ngram Viewer )