BOB vs cooter

BOB

noun
  • Vibrator (device designed to stimulate a woman's genitals). 

adj
  • Back-of-the-book; denoting those stamps in a catalogue that are not used for the payment of regular postage fees, and are displayed separately in the catalogue after that listing; the division between these two groups varies with the publisher. 

cooter

noun
  • Vagina or vulva. 

  • The box turtle. 

  • A redneck. 

  • A freshwater turtle of the eastern United States of the genus Pseudemys. 

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