free spirit vs oner

free spirit

noun
  • A member of the organized heretic movement Brethren of the Free Spirit in opposition of the Catholic Church from the 13th to 15th centuries. 

  • One who is a nonconformist or who does not recognize the authority of others. 

oner

noun
  • A small marble of little worth in children's games. 

  • A long one-take shot, or equivalent animated segment simulating a one-take shot 

  • An extraordinary individual. 

  • A conker that has won one match. 

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