higgler vs travelling salesman

higgler

noun
  • A seller of any kind of small produce or wares; a huckster. 

  • A person who haggles or negotiates for lower prices. 

travelling salesman

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

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