nidorous vs olfactory

nidorous

adj

  • Emitting a strong, unpleasant odor, especially one like that of cooking fat or similar greasy substances. 

olfactory

adj

  • Concerning the sense of smell. 

noun

  • The sense of smell. 

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