dream up vs foreguess

dream up

verb
  • To have an imaginative, unusual or foolish idea, to invent something unreal. 

foreguess

verb
  • To conjecture; assume. 

  • To forecast. 

  • To guess beforehand. 

  • To anticipate; expect. 

noun
  • A conjecture; an assumption. 

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