skirt vs swallowtail

skirt

noun
  • A petticoat. 

  • An article of clothing, usually worn by women and girls, that hangs from the waist and covers the lower part of the body. 

  • The part of a dress or robe, etc., that hangs below the waist. 

  • Border; edge; margin; extreme part of anything. 

  • The diaphragm, or midriff, in animals 

  • Women collectively, in a sexual context. 

  • A woman. 

  • Sexual intercourse with a woman. 

  • A loose edging to any part of a dress. 

verb
  • To avoid or ignore (something); to manage to avoid (something or a problem); to skate by (something). 

  • To be on or form the border of. 

  • To move around or along the border of; to avoid the center of. 

  • To cover with a skirt; to surround. 

swallowtail

noun
  • A type of tailcoat with two long tapering tails.ᵂᵖ 

  • The forked tail of a swallow. 

  • Anything, such as a burgee, of a similar forked shape. 

  • Any of various butterflies of the family Papilionidae, many of which have a long extension to each hindwing. 

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