good faith vs validity

good faith

noun
  • Good, honest intentions, even if producing unfortunate results. 

adj
  • Having or done with good, honest intentions; well-intentioned. 

  • Presuming that all parties to a discussion are honest and intend to act in a fair and appropriate manner. 

validity

noun
  • The state of being valid, authentic or genuine. 

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

  • State of having legal force. 

  • 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 good faith and validity occurred in a corpus of books? (source: Google Ngram Viewer )