bondage vs duress

bondage

noun
  • The state of lacking freedom; constraint. 

  • 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. 

duress

noun
  • Constraint by threat. 

  • Restraint in which a person is influenced, whether by lawful or unlawful forceful compulsion of their liberty by monition or implementation of physical enforcement; legally for the incurring of civil liability, of a citizen's arrest, or of subrogation, or illegally for the committing of an offense, of forcing a contract, or of using threats. 

verb
  • To put under duress; to pressure. 

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