briefs vs pantalettes

briefs

noun
  • A very short, close-fitting type of underpants. 

pantalettes

noun
  • A form of long underpants with a frill at the bottom of each leg. 

  • A removable kind of ruffle worn at the feet of women's drawers. 

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