olfactory vs perceptible

olfactory

noun

  • The sense of smell. 

adj

  • Concerning the sense of smell. 

perceptible

noun

  • Anything that can be perceived. 

adj

  • Able to be perceived, sensed, or discerned. 

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