craps vs lask

craps

noun
  • (preceded by the) diarrhea 

  • A game of gambling, or chance, where the players throw dice to make scores and avoid crap. 

lask

noun
  • Originally of both persons and animals, now only of animals: looseness of the bowels; diarrhoea; (countable) a bout of this ailment. 

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