foreguess vs speculate

foreguess

verb
  • To conjecture; assume. 

  • To forecast. 

  • To guess beforehand. 

  • To anticipate; expect. 

noun
  • A conjecture; an assumption. 

speculate

verb
  • To make an inference based on inconclusive evidence; to surmise or conjecture. 

  • To make a risky trade in the hope of making a profit; to venture or gamble. 

  • To anticipate which branch of code will be chosen and execute it in advance. 

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