independent vs self-sustaining

independent

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

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

  • Not affiliated with any political party. 

  • Separate from; exclusive; irrespective. 

  • Providing a comfortable livelihood. 

noun
  • A team not affiliated with any league or conference. 

  • A neutral or uncommitted person. 

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

  • A small, privately owned business. 

self-sustaining

adj
  • Able to provide for one's own needs without help from others; self-sufficient. 

  • Able to sustain itself without the need for additional fuel. 

  • Opposing or rejecting exterior influence; independent. 

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