gustatory vs mouthwatering

gustatory

adj
  • Of, or relating to, the sense of taste. 

mouthwatering

adj
  • That is pleasing to the sense of taste; appetizing; that makes one salivate. 

  • Enticing or tantalizing. 

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