foot passenger vs teamster

foot passenger

noun
  • A passenger on a ferry who does not have a car, or any other form of transport, with them. 

teamster

noun
  • A person who drives a cargo truck (see Teamster). 

  • A person who drives a team of animals (such as horses or oxen). 

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