drawing card vs inducement

drawing card

noun
  • Synonym of drawcard (“something that attracts patronage to a place or an event”) 

inducement

noun
  • An incentive that helps bring about a desired state. In some contexts, this can imply bribery. 

  • An introductory statement of facts or background information. 

  • The act of placing a port on a vessel's itinerary because the volume of cargo offered at that port justifies the cost of routing the vessel. 

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