foreguess vs spitball

foreguess

verb
  • To forecast. 

  • To guess beforehand. 

  • To conjecture; assume. 

  • To anticipate; expect. 

noun
  • A conjecture; an assumption. 

spitball

verb
  • To brainstorm ideas. 

  • To moisten the ball with saliva before pitching it. 

noun
  • A balled-up piece of paper, moistened with saliva (by chewing) and shot through a drinking straw. 

  • A pitch of a baseball that has been partly covered with saliva, illegal at most levels. 

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