dirndl vs hemline

dirndl

noun
  • A traditional Alpine women's dress having a tight bodice and full skirt 

hemline

noun
  • The line formed by the bottom edge of a skirt, dress, or coat; hem. 

  • The height of this line, measured from the floor. 

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