BOB vs snowball

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. 

snowball

noun
  • A sex act involving passing ejaculated semen from one person's mouth to another's. 

  • A cocktail made from lemonade and advocaat. 

  • A ball of snow, usually one made in the hand and thrown for amusement in a snowball fight; also a larger ball of snow made by rolling a snowball around in snow that sticks to it and increases its diameter. 

  • A type of ice dessert. 

  • A type of cake. 

  • Something that snowballs (grows rapidly out of control). 

adj
  • Of something with rapid growth, often uncontrolled. Compare snowball effect. 

verb
  • To receive ejaculated semen in one's mouth, and to then pass it back and forth between one’s mouth and another person’s mouth. 

  • To pelt with snowballs; to throw snowballs at. 

  • To rapidly grow out of proportion or control. 

  • To play at throwing snowballs. 

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