bag of nerves vs peabrain

bag of nerves

noun

  • A very nervous person. 

peabrain

noun

  • the brain of such a person. 

  • a stupid or clumsy person; a cretin. 

adj

  • stupid, clumsy, idiot 

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