count upon vs guess

count upon

verb
  • Synonym of count on 

guess

verb
  • To think, conclude, or decide (without a connotation of uncertainty). Usually in first person: "I guess". 

  • to suppose (introducing a proposition of uncertain plausibility). 

  • To solve by a correct conjecture; to conjecture rightly. 

  • To reach a partly (or totally) unqualified conclusion. 

noun
  • A prediction about the outcome of something, typically made without factual evidence or support. 

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