Montezuma's revenge vs diarrhea

Montezuma's revenge

noun
  • Diarrhea experienced by tourists after drinking water or eating food in Mexico as a result of a microorganism to which native Mexicans are immune. 

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. 

How often have the words Montezuma's revenge and diarrhea occurred in a corpus of books? (source: Google Ngram Viewer )