incentive vs petting

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. 

petting

noun
  • The act of indulging or treating as a favourite. 

  • The act of stroking or gently patting an animal. 

  • The act of kissing, stroking, etc., a person in a sexual manner. 

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