aura vs odor

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. 

odor

noun
  • A strong, pervasive quality. 

  • Any smell, whether fragrant or offensive. 

  • Esteem. 

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