chortle vs sneer

chortle

noun
  • A joyful, somewhat muffled laugh, rather like a snorting chuckle. 

  • A similar sounding vocalisation of various birds. 

verb
  • To laugh with a chortle or chortles. 

sneer

noun
  • A display of contempt; scorn. 

  • A facial expression where one slightly raises one corner of the upper lip, generally indicating scorn. 

verb
  • To utter with a grimace or contemptuous expression; to say sneeringly. 

  • To raise a corner of the upper lip slightly, especially in scorn 

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