grease vs sweetener

grease

noun
  • bribe money. 

  • Any oily or fatty matter. 

  • Shorn but not yet cleansed wool. 

  • Inflammation of a horse's heels, also known as scratches or pastern dermatitis. 

  • Animal fat in a melted or soft state. 

verb
  • To kill, murder. 

  • To cause to go easily; to facilitate. 

  • To affect (a horse) with grease, the disease. 

  • To perform a landing extraordinarily smoothly. 

  • To put grease or fat on something, especially in order to lubricate. 

  • To bribe. 

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 grease and sweetener occurred in a corpus of books? (source: Google Ngram Viewer )