tickling vs weakness

tickling

noun
  • The act by which someone is tickled. 

  • A sensation that tickles. 

adj
  • That tickles 

weakness

noun
  • A special fondness or desire. 

  • An inadequate quality; fault 

  • The condition of being weak. 

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