dogging vs skipping

dogging

noun
  • The act of one who dogs or harasses. 

  • The practice of having sexual intercourse in public places, especially parks, deliberately taking the chance of being watched. 

skipping

noun
  • The act by which something is skipped or omitted. 

  • The game, activity, or exercise of jump rope. 

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