sensational vs unforgettable

sensational

adj
  • Piquing or arousing the senses. 

  • Provoking a reaction of interest or excitement. 

  • Of or pertaining to sensation. 

  • Exceptionally great. 

unforgettable

adj
  • Very difficult or impossible to forget. 

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