conjecture vs forecast

conjecture

verb
  • To guess; to venture an unproven idea. 

  • To infer on slight evidence; to guess at. 

noun
  • A statement or an idea which is unproven, but is thought to be true; a guess. 

  • A statement likely to be true based on available evidence, but which has not been formally proven. 

  • A supposition based upon incomplete evidence; a hypothesis. 

forecast

verb
  • To foreshadow; to suggest something in advance. 

  • To estimate how something will be in the future. 

noun
  • exacta 

  • An estimation of a future condition. 

  • A prediction of the weather. 

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