breath vs troposphere

breath

noun
  • Air expelled from the lungs. 

  • A single act of breathing in or out; a breathing of air. 

  • The act or process of breathing. 

  • A rest or pause. 

  • A small amount of something, such as wind, or common sense. 

adj
  • voiceless, surd; contrasting with voice (breath sounds, voice sounds) 

troposphere

noun
  • The lower levels of the atmosphere extending from the surface of the Earth or another celestial body up to the tropopause. It is characterized by convective air movements and a large vertical temperature change. 

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