dying vs heart attack

dying

noun
  • The process of approaching death; loss of life; death. 

adj
  • Declining, terminal, or drawing to an end. 

  • Pertaining to death, or the moments before death. 

  • Approaching death; about to die; moribund. 

heart attack

noun
  • Death or failure. 

  • An acute myocardial infarction, sometimes fatal, caused by the sudden occurrence of coronary thrombosis, which obstructs the blood supply to the heart and leads to necrosis of heart muscle tissue. 

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