deviation vs validity

deviation

noun
  • A detour to one side of the originally-planned flightpath (for instance, to avoid weather); the act of making such a detour. 

  • A detour in a road or railway. 

  • The act of deviating; wandering off the correct or true path or road. 

  • The voluntary and unnecessary departure of a ship from, or delay in, the regular and usual course of the specific voyage insured, thus releasing the underwriters from their responsibility. 

  • The shortest distance between the center of the target and the point where a projectile hits or bursts. 

  • A departure from the correct way of acting. 

  • For interval variables and ratio variables, a measure of difference between the observed value and the mean. 

  • The signed difference between a value and its reference value. 

  • The state or result of having deviated; a transgression; an act of sin; an error; an offense. 

validity

noun
  • 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. 

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