joiner vs rolly polly

joiner

noun
  • A maker of wooden furniture or fittings. 

  • A thing that joins two separate items, e.g. software to connect video or music clips. 

  • A woodworking machine used to prepare edges of wooden elements to join to other wood pieces. 

  • A person who joins societies or organizations. 

rolly polly

noun
  • A woodlouse. 

  • A forward roll or a backwards roll. 

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