eroticism vs tickling

eroticism

noun
  • sexual excitement, especially if abnormally persistent 

  • the state of being erotic, or of being sexually aroused 

tickling

noun
  • A sensation that tickles. 

  • The act by which someone is tickled. 

adj
  • That tickles 

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