exigency vs independence

exigency

noun
  • The demands or requirements of a situation. 

  • An urgent situation, one requiring extreme effort or attention. 

independence

noun
  • The quality or state of being independent; lack of dependence; the state of not being reliant on, or controlled by, others. 

  • The state of having sufficient means for a comfortable livelihood. 

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