BOB vs roger

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. 

roger

noun
  • An act of sexual intercourse. 

intj
  • Received (used in radio communications to acknowledge that a message has been received and understood) 

verb
  • Of a man, to have sexual intercourse with (someone), especially in a rough manner. 

  • To have sexual intercourse. 

  • To acknowledge by saying "roger". 

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