Poindexter vs brainiac

Poindexter

noun
  • A bookish or socially unskilled person. 

name
  • A surname from Jersey Norman. 

brainiac

noun
  • A very intelligent and usually studious, erudite person. 

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