petticoat vs pinafore

petticoat

noun
  • A type of ornamental skirt or underskirt, often displayed below a dress; chiefly in plural, designating a woman's skirts collectively. 

  • A light woman's undergarment worn under a dress or skirt, and hanging either from the shoulders or (now especially) from the waist; a kind of slip, worn to make the skirt fuller, or for extra warmth. 

  • A woman's undercoat, worn to be displayed beneath an open gown. 

  • A woman. 

  • A fisherman's loose canvas or oilcloth skirt. 

  • A bell-mouthed piece over the exhaust nozzles in the smokebox of a locomotive, strengthening and equalising the draught through the boiler-tubes. 

  • A tight, usually padded undercoat worn by men over a shirt and under the doublet. 

verb
  • To dress in a petticoat. 

pinafore

noun
  • A sleeveless dress, often similar to an apron, generally worn over other clothes, and most often worn by young girls as an overdress. 

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