endearment vs tickling

endearment

noun
  • The state or characteristic of being endeared. 

  • An expression of affection. 

  • The act or process of endearing, of causing (something or someone) to be loved or to be the object of affection. 

tickling

noun
  • The act by which someone is tickled. 

  • A sensation that tickles. 

adj
  • That tickles 

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