scrotum vs treasure chest

scrotum

noun
  • The sac of skin and muscle that contains the testicles in most mammals. 

treasure chest

noun
  • Any source of something valuable or beautiful. 

  • A treasury, especially a state or royal treasury. 

  • A chest filled with treasure, especially one used by pirates, etc. 

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