asphyxia vs choking

asphyxia

noun
  • Loss of consciousness due to the interruption of breathing and consequent anoxia. 

  • Loss of consciousness due to the body's inability to deliver oxygen to its tissues, either by the breathing of air lacking oxygen or by the inability of the blood to carry oxygen. 

choking

noun
  • The process in which a person's airway becomes blocked, resulting in asphyxia in cases that are not treated promptly. 

  • The act of coughing when a person finds it difficult to breath. 

  • The act of trying to kill a person by strangulation. 

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