costermonger vs purveyor

costermonger

noun
  • A trader who sells fruit and vegetables from a cart or barrow in the street. 

purveyor

noun
  • Someone who supplies what is needed, especially food. 

  • An officer who provided provisions for the king's household. 

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