boffola vs chortle

boffola

noun
  • A coarse or farcical gag; a joke provoking hearty laughter. 

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. 

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