bondage vs enslavement

bondage

noun
  • The state of being enslaved or the practice of slavery. 

  • The practice of physically restraining people for sexual pleasure, such as by tying up or shackling. 

  • Applied to clothing with many buckles, zips, etc., associated with punk and goth subcultures. 

  • The state of lacking freedom; constraint. 

enslavement

noun
  • The act of enslaving or the state of being a slave; bondage 

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