muppet vs peabrain

muppet

noun

  • An incompetent or foolish person. 

peabrain

noun

  • a stupid or clumsy person; a cretin. 

  • the brain of such a person. 

adj

  • stupid, clumsy, idiot 

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