idiotish vs peabrain

idiotish

adj

  • Like an idiot; idiotic; foolish. 

peabrain

adj

  • stupid, clumsy, idiot 

noun

  • a stupid or clumsy person; a cretin. 

  • the brain of such a person. 

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