labored breathing vs sob

labored breathing

noun
  • Breathing at less than 12 or more than 20 breaths per minute with poor or irregular quality, rhythm, or tidal volume; a sign of respiratory distress. 

sob

noun
  • A cry with a short, sudden expulsion of breath. 

  • sound of sob 

verb
  • To soak. 

  • To say (something) while sobbing. 

  • To weep with convulsive gasps. 

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