asphyxia vs dullness

asphyxia

noun
  • 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. 

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

dullness

noun
  • Lack of interest or excitement. 

  • The quality of not perceiving or kenning things distinctly. 

  • The quality of being uninteresting; boring; humorless or irksome. 

  • The quality of being slow of understanding things; stupidity. 

  • The lack of visual brilliance; want of sheen. 

  • bluntness. 

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