diarrhea vs lask

diarrhea

noun
  • A gastrointestinal disorder characterized by frequent and very soft or watery bowel movements. 

  • The watery or very soft excrement that comes from such bowel movements. 

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 diarrhea and lask occurred in a corpus of books? (source: Google Ngram Viewer )