dower vs subtract

dower

noun
  • The part of or interest in a deceased husband's property provided to his widow, usually in the form of a life estate. 

  • Property given by a groom directly to his bride at or before their wedding in order to legitimize the marriage; dowry. 

verb
  • To endow. 

  • To give a dower or dowry to. 

subtract

verb
  • To remove or reduce; especially to reduce a quantity or number 

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