heart failure vs myocardial infarction

heart failure

noun
  • The chronic inability of the heart to pump a sufficient amount of blood throughout the body, leading to a pooling of blood and shortness of breath. 

  • The cessation of the heartbeat; cardiac arrest. 

myocardial infarction

noun
  • Necrosis of heart muscle caused by an interruption to the supply of blood to the heart, often as a result of coronary thrombosis. 

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