betrothed vs betrothen

betrothed

noun

  • One who is betrothed, i.e. a fiancé or fiancée. 

adj

  • Engaged to be married. 

betrothen

noun

  • One who is betrothen or betrothed, i.e. a fiancé or fiancée. 

adj

  • Betrothed 

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