Blockhead vs Dipper

Blockhead

noun
  • A fan of the American boy band New Kids on the Block. 

Dipper

noun
  • A member or supporter of the Canadian New Democratic Party. 

  • Of or pertaining to the Canadian New Democratic Party or supporters thereof. 

name
  • Either the Big Dipper or the Little Dipper (in the singular, chiefly the Big Dipper). 

  • A Chinese constellation located near Sagittarius, one of the 28 lunar mansions and part of the larger Black Turtle. 

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