Poindexter vs nerdbrain

Poindexter

noun

  • A bookish or socially unskilled person. 

name

  • A surname from Jersey Norman. 

nerdbrain

noun

  • A nerd; a socially awkward brainy person. 

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