merkin vs toupee

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. 

toupee

noun
  • A wig of false hair worn to cover a bald spot, especially as worn by a man. 

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