independent vs undecided

independent

noun
  • A candidate or voter not affiliated with any political party, a freethinker, free of a party platform. 

  • A team not affiliated with any league or conference. 

  • A neutral or uncommitted person. 

  • A small, privately owned business. 

adj
  • Not dependent; not contingent or depending on something else; free. 

  • Not affiliated with any political party. 

  • Separate from; exclusive; irrespective. 

  • Providing a comfortable livelihood. 

  • Not subject to bias or influence; self-directing. 

undecided

noun
  • A voter etc. who has not yet come to a decision. 

adj
  • Uncommitted, not having reached a decision. 

  • Open and not yet settled or determined. 

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