BOB vs prog

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. 

prog

noun
  • Progesterone. 

  • Progressive rock. 

  • A progressive. 

  • A program. 

  • A pointed instrument. 

verb
  • To programme. 

  • To prognosticate; to forecast. 

  • To prick; to goad; to progue. 

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