congestive heart failure vs myocardial infarction

congestive heart failure

noun
  • A syndrome marked by weakness, edema and shortness of breath, due to the inability of the heart to circulate the blood adequately to the lungs and other tissues. 

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 congestive heart failure and myocardial infarction occurred in a corpus of books? (source: Google Ngram Viewer )