reason vs thought

reason

noun
  • Rational thinking (or the capacity for it); the cognitive faculties, collectively, of conception, judgment, deduction and intuition. 

  • That which causes something: an efficient cause, a proximate cause. 

  • An excuse: a thought or a consideration offered in support of a determination or an opinion; that which is offered or accepted as an explanation. 

  • A premise placed after its conclusion. 

  • A motive for an action or a determination. 

verb
  • To support with reasons, as a request. 

  • To arrange and present the reasons for or against; to examine or discuss by arguments; to debate or discuss. 

  • To persuade by reasoning or argument. 

  • To find by logical process; to explain or justify by reason or argument. 

  • To deduce or come to a conclusion by being rational 

  • To overcome or conquer by adducing reasons. 

  • To perform a process of deduction or of induction, in order to convince or to confute; to argue. 

thought

noun
  • The operation by which mental activity arise or are manipulated; the process of thinking; the agency by which thinking is accomplished. 

  • A very small amount, distance, etc.; a whit or jot. 

  • A way of thinking (associated with a group, nation or region). 

  • Anxiety, distress. 

  • Representation created in the mind without the use of one's faculties of vision, sound, smell, touch, or taste; an instance of thinking. 

  • The careful consideration of multiple factors; deliberation. 

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