merkin vs periwig

merkin

noun
  • A woman's pubic wig. Worn for nude stage appearances and by women, originally after shaving their pubic hair to eliminate lice or for other reasons, now often as a fashion item. 

  • An American. 

  • A mop for cleaning cannon. 

  • The male counterpart of a beard, a companion to a lesbian to feign her straightness. 

periwig

noun
  • A wig, especially any kind of stylised wig as formerly worn by men and women. 

verb
  • To dress with a periwig, or with false hair; to bewig. 

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