fiancé vs ostler

fiancé

noun
  • A person engaged to be married. 

  • A man who is engaged to be married; the man to whom one is engaged. 

ostler

noun
  • A person employed at an inn, hostelry, or stable to look after horses; a groom 

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