Lorelei vs enchantress

Lorelei

name
  • A female given name from German. 

enchantress

noun
  • A beautiful, charming and irresistible woman. 

  • A femme fatale. 

  • A woman, especially an attractive one, skilled at using magic; an alluring witch. 

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