circularize vs hard sell

circularize

verb
  • To distribute a circular or circulars to. 

  • To publicize something by publishing and distributing circulars. 

  • To make (something) circular in shape. 

  • To canvass opinion by using a questionnaire. 

hard sell

noun
  • A sales technique of pressuring the potential buyer to agree to a purchase. 

  • A sales transaction which is challenging for the sales person to make; any act or object of persuasion which is challenging. 

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