métier vs saving grace

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. 

saving grace

noun
  • A redeeming quality or factor. 

  • God's grace or blessing, enabling sinners to attain salvation. 

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