fidget vs mess around

fidget

verb
  • To wiggle or twitch; to move the body, especially the fingers, around nervously or idly. 

  • To cause to fidget; to make uneasy. 

noun
  • A person who fidgets, especially habitually. 

  • A nervous wriggling or twitching motion. 

  • A toy intended to be fidgeted with. 

mess around

verb
  • To fiddle idly. 

  • To joke, kid, or play. 

  • To have a sexual relationship, especially one which is non-commital. 

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