caress vs tickling

caress

noun
  • A gentle stroking or rubbing. 

  • An act of endearment; any act or expression of affection; an embracing, or touching, with tenderness. 

verb
  • To touch or kiss lovingly; to fondle. 

  • To affect as if with a caress. 

tickling

noun
  • A sensation that tickles. 

  • The act by which someone is tickled. 

adj
  • That tickles 

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