envy vs tickling

envy

noun
  • An object of envious notice or feeling. 

  • Resentful desire of something possessed by another or others (but not limited to material possessions). 

verb
  • To feel displeasure or hatred towards (someone) for their good fortune or possessions. 

  • To resentfully or discontentedly desire (something someone else has that one lacks). 

tickling

noun
  • The act by which someone is tickled. 

  • A sensation that tickles. 

adj
  • That tickles 

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