foreguess vs opine

foreguess

verb
  • To conjecture; assume. 

  • To forecast. 

  • To guess beforehand. 

  • To anticipate; expect. 

noun
  • A conjecture; an assumption. 

opine

verb
  • To have or express an opinion; to state as an opinion; to suppose, consider (that). 

  • To give one's formal opinion (on or upon something). 

noun
  • Any of a class of organic compounds, derived from amino acids, found in some plant tumours 

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