Poindexter vs worthless person

Poindexter

noun
  • A bookish or socially unskilled person. 

name
  • A surname from Jersey Norman. 

worthless person

noun
  • a person of no worth or value; a contemptibly insignificant person 

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