congestive heart failure vs heart failure

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. 

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. 

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