captivity vs independence

captivity

noun
  • The state or period of being imprisoned, confined, or enslaved. 

  • The state of being captive. 

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 captivity and independence occurred in a corpus of books? (source: Google Ngram Viewer )