provocative vs titillating

provocative

adj
  • Serving or tending to excite, stimulate or arouse sexual interest; sexy. 

  • Serving or tending to elicit a strong, often negative sentiment in another person; exasperating. 

titillating

adj
  • Pleasantly and sensually exciting. 

  • Arousing. 

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