tour guide vs usher

tour guide

noun
  • A person who provides assistance and information to people on organised tours. 

usher

noun
  • A person, in a church, cinema etc., who escorts people to their seats. 

  • A male escort at a wedding. 

  • A doorkeeper in a courtroom. 

verb
  • To lead or guide somewhere. 

  • To precede; to act as a forerunner or herald. 

  • To accompany or escort (someone). 

  • To guide people to their seats. 

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