inducement vs sweetener

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. 

sweetener

noun
  • Something given or added to added to a deal to sweeten another's attitude, especially a bribe or kickback. 

  • A shill bidder at an auction. 

  • Something added to food to sweeten its taste, especially an artificial substitute for sugar. 

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