hard sell vs prevention

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. 

prevention

noun
  • precaution; forethought. 

  • Any measure intended to limit health-related risks (such as information campaigns, vaccination, early diagnosis etc.). 

  • The act of preventing or hindering; obstruction of action, access, or approach; thwarting. 

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