overburden vs puss

overburden

noun
  • A sterile stratum that lies above the stratum being investigated 

  • The rock and subsoil that lies above a mineral deposit such as a coal seam. 

verb
  • To overload or overtax. 

puss

noun
  • The vulva (female genitalia). 

  • The face. 

  • A coward; a wuss; someone who is unable to stand up for themself. 

  • A cat. 

  • Sex with a woman. 

  • The mouth. 

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