fodder vs incentive

fodder

noun
  • Stuff; material; something that serves as inspiration or encouragement, especially for satire or humour. 

  • People considered to have negligible value and easily available or expendable. 

  • Food for animals; that which is fed to cattle, horses, and sheep, such as hay, cornstalks, vegetables, etc. 

  • A load: various English units of weight or volume based upon standardized cartloads of certain commodities, generally around 1000 kg. 

  • The text to be operated on (anagrammed, etc.) within a clue. 

  • Tracing paper. 

verb
  • To feed animals (with fodder). 

incentive

noun
  • Something that motivates, rouses, or encourages. 

  • A bonus or reward, often monetary, to work harder. 

adj
  • Inciting; encouraging or moving; rousing to action; stimulating. 

  • Serving to kindle or set on fire. 

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