guess vs suspect

guess

verb
  • 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. 

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

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

suspect

verb
  • To imagine or suppose (something) to be true, or to exist, without proof. 

  • To have suspicion. 

  • To believe (someone) to be guilty. 

  • To distrust or have doubts about (something or someone). 

noun
  • A person who is suspected of something, in particular of committing a crime. 

adj
  • Viewed with suspicion; suspected. 

  • Viewing with suspicion; suspecting. 

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