hoo-hoo vs peter

hoo-hoo

noun
  • The genitals or genital area. 

peter

noun
  • The penis. 

  • A prison cell. 

  • A safe. 

verb
  • Chiefly followed by out: originally (mining), of a vein of ore: to be depleted of ore; now (generally), to diminish to nothing; to dwindle, to trail off. 

  • Synonym of blue peter 

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