fault vs validity

fault

noun
  • An illegal serve. 

  • A characteristic, positive or negative or both, which subjects a person or thing to increased risk of danger. 

  • In coal seams, coal rendered worthless by impurities in the seam. 

  • A mistake or error. 

  • A lost scent; act of losing the scent. 

  • Blame; the responsibility for a mistake. 

  • A fracture in a rock formation causing a discontinuity. 

  • A weakness of character; a failing. 

  • A minor offense. 

  • A defect; something that detracts from perfection. 

  • An abnormal connection in a circuit. 

verb
  • To commit a mistake or error. 

  • To fracture. 

  • To undergo a page fault. 

  • To criticize, blame or find fault with something or someone. 

validity

noun
  • State of having legal force. 

  • The genuinity - as distinguished from the efficacity or the regularity - of a sacrament as a result of some formal dispositions being fulfilled. 

  • The state of being valid, authentic or genuine. 

  • A quality of a measurement indicating the degree to which the measure reflects the underlying construct, that is, whether it measures what it purports to measure (see reliability). 

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