métier vs specialty

métier

noun
  • An outstanding or beneficial feature. 

  • Any activity that is pursued as a trade or profession; a calling. 

  • An activity to which a person is particularly suited. 

specialty

noun
  • An attribute or quality peculiar to a species. 

  • A particular or peculiar case. 

  • That in which one specializes; a chosen expertise or talent. 

  • A contract or obligation under seal; a contract by deed; a writing, under seal, given as security for a debt particularly specified. 

  • A product that originates in and is characteristic of a place. 

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