consumer vs travelling salesman

consumer

noun
  • Someone who trades money for goods or services as an individual. 

  • One who, or that which, consumes. 

  • An organism (heterotroph) that uses other organisms for food in order to gain energy. 

  • The consumer base of a product, service or business. 

travelling salesman

noun
  • A man who travels, often within a certain territory, soliciting orders or selling goods. 

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