chemise vs underskirt

chemise

noun
  • A woman's dress that fits loosely; a chemise dress. 

  • A loose shirtlike undergarment, especially for women. 

  • A wall that lines the face of a bank or earthwork. 

  • A short nightdress, or similar piece of lingerie. 

underskirt

noun
  • An under layer of a multi-layer gown over which outer skirts are draped. 

  • A skirt worn underneath another skirt; a petticoat. 

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