inference vs irrationality

inference

noun
  • That which is inferred; a truth or proposition drawn from another which is admitted or supposed to be true; a conclusion; a deduction. 

  • The act or process of inferring by deduction or induction. 

irrationality

noun
  • Something which is irrational or brought forth by irrational action, judgement, idea or thought. 

  • The property of being irrational. 

  • The quality or state of being irrational; want of the faculty or the quality of reason; fatuity. 

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