French knickers vs knickers

French knickers

noun

  • A type of full-fitting women's underwear. 

knickers

noun

  • Women's underpants. 

  • Knickerbockers. 

  • For attributive usage of sense 2 see knicker. 

intj

  • A mild exclamation of annoyance. 

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