bondage vs slavery

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. 

slavery

noun
  • A condition of servitude endured by a slave. 

  • A condition in which one is captivated or subjugated, as by greed or drugs. 

  • An institution or social practice of owning human beings as property, especially for use as forced laborers. 

  • Forced labor in general, regardless of legality. 

adj
  • Covered in slaver; slobbery. 

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