bap vs dirty pillow

bap

noun
  • A woman's breast. 

  • A soft bread roll, originally from Ireland. 

verb
  • To hit lightly. 

intj
  • The sound of a light blow or slap. 

dirty pillow

noun
  • A breast, especially a woman's breast. 

  • Used other than figuratively or idiomatically: see dirty, pillow. 

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