BOB vs mongrel

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. 

mongrel

noun
  • An erect penis; an erection. 

  • A thuggish, obnoxious, or contemptible person; (often preceded by "poor") a pitiable person. 

  • Someone or something of mixed kind or uncertain origin, especially a dog. 

adj
  • Of mixed breed, nature, or origin; of or like a mongrel. 

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