emancipation vs exemption

emancipation

noun
  • The state of being thus set free; liberation (used, for example, of slaves from bondage, of a person from prejudices, of the mind from superstition, of a nation from tyranny or subjugation). 

  • The act of setting free from the power of another, as from slavery, subjection, dependence, or controlling influence. 

exemption

noun
  • Freedom from a defect or weakness. 

  • The state of being exempt; immunity. 

  • An act of exempting. 

  • A deduction from the normal amount of taxes. 

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