extinction vs frankpledge

extinction

noun
  • The action of making or becoming extinct; annihilation. 

  • The absorption or scattering of electromagnetic radiation emitted by astronomical objects by intervening dust and gas before it reaches the observer. 

  • The inability to perceive multiple stimuli simultaneously. 

  • The fading of a conditioned response over time if it is not reinforced. 

frankpledge

noun
  • A form of collective suretyship and punishment under English law among the members of a tithing. 

  • A decener: a member of a tithing bound in frankpledge. 

  • Any group so similarly answerable for the conduct of all its members and liable for collective punishment. 

  • The tithing itself. 

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