hitchhiker vs social butterfly

hitchhiker

noun
  • A person or thing that hitchhikes. 

  • A dance move in which the dancer mimics the motions of someone thumbing a ride. 

  • A bur that attaches and clings to clothing, or a bur-bearing plant. 

  • An item attached to a travel bug and hidden in a geocache to be found and transported to other caches or around the world. 

  • An advertisement at the end of a programme. 

social butterfly

noun
  • A gregarious person who likes to attend parties and other social gatherings; a people person. 

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