Montezuma's revenge vs constipation

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. 

constipation

noun
  • The act of crowding anything into a lesser space, or the state of being crowded or pressed together; condensation. 

  • A state of the bowels in which the evacuations are infrequent and difficult, or the intestines become filled with hardened faeces 

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