cowgirl vs old maid

cowgirl

noun
  • A playing card of queen rank. 

  • A woman who identifies with cowboy culture, including clothing such as the cowboy hat. 

  • A sex position where the woman is on top; cowgirl position. 

  • A woman who tends free-range cattle, especially in the American West. 

verb
  • To work as a cowgirl, herding cattle. 

  • To mount someone and have sexual intercourse in the cowgirl position. 

old maid

noun
  • The unmatchable card in that game. 

  • An unpopped kernel in a batch of popped popcorn kernels. 

  • The Madagascar periwinkle. 

  • An old woman who has never married; a spinster. 

  • A card game in which cards must be paired and one undesirable card is designated "old maid". 

  • The common zinnia. 

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