Delhi belly vs diarrhea

Delhi belly

noun
  • Digestive illness or diarrhoea, especially if suffered by a visitor to India. 

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