clacker vs ying-yang

clacker

noun

  • The anus. 

  • Any device that makes a clacking noise. 

  • A percussion instrument that makes a clacking noise. 

ying-yang

noun

  • Anus; asshole 

  • Penis 

How often have the words clacker and ying-yang occurred in a corpus of books? (source: Google Ngram Viewer )