atmosphere vs aura

atmosphere

noun
  • The air in a particular place. 

  • The gases surrounding the Earth or any astronomical body. 

  • Extras in a scene who have no spoken lines. 

  • The conditions (such as music, illumination etc.) that can influence the mood felt in an environment. 

  • The apparent mood felt in an environment. 

  • A unit of measurement for pressure equal to 101325 Pa (symbol: atm) 

aura

noun
  • Distinctive atmosphere or quality associated with something. 

  • Telltale sensation experienced by some people with epilepsy before a seizure. 

  • An invisible force surrounding a living creature. 

  • Perceptual disturbance experienced by some migraine sufferers before a migraine headache. 

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