olfactory vs phenomenal

olfactory

adj
  • Concerning the sense of smell. 

noun
  • The sense of smell. 

phenomenal

adj
  • Perceptible by the senses through immediate experience. 

  • Of or pertaining to the appearance of the world, as opposed to the ultimate nature of the world as it is in itself. 

  • Very remarkable; highly extraordinary; amazing. 

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