presumption vs speculation

presumption

noun
  • the act of presuming, or something presumed 

  • the condition upon which something is presumed 

  • the belief of something based upon reasonable evidence, or upon something known to be true 

  • An inference that a trier of fact is either permitted or required to draw under certain factual circumstances (as prescribed by statute or case law) unless the party against whom the inference is drawn is able to rebut it with admissible, competent evidence. 

speculation

noun
  • The act or process of reasoning a priori from premises given or assumed. 

  • An investment involving higher-than-normal risk in order to obtain a higher-than-normal return. 

  • A conclusion to which the mind comes by speculating; mere theory; notion; conjecture. 

  • The act or practice of buying land, goods, shares, etc., in expectation of selling at a higher price, or of selling with the expectation of repurchasing at a lower price; a trading on anticipated fluctuations in price, as distinguished from trading in which the profit expected is the difference between the retail and wholesale prices, or the difference of price in different markets. 

  • A card game in which the players buy from one another trumps or whole hands, upon a chance of getting the highest trump dealt, which entitles the holder to the pool of stakes. 

  • The process of thinking or meditating on a subject. 

  • The process of anticipating which branch of code will be chosen and executing it in advance. 

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