thwack vs toenail

thwack

verb
  • To hit with a flat implement. 

  • To beat. 

  • To fill to overflow. 

noun
  • The act of thwacking; a strike or blow, especially with a flat implement. 

  • A heavy slapping sound. 

toenail

verb
  • To fasten two pieces of lumber together by applying nails or screws into both boards at an angle. 

noun
  • The thin, horny, transparent plate covering the upper surface of the end of a toe. 

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