foundation vs validity

foundation

noun
  • The act of founding, fixing, establishing, or beginning to erect. 

  • The result of the work to begin something; that which stabilizes and allows an enterprise or system to develop. 

  • The lowest and supporting part or member of a wall, including the base course and footing courses; in a frame house, the whole substructure of masonry. 

  • A donation or legacy appropriated to support a charitable institution, and constituting a permanent fund; endowment. 

  • A basis for social bodies or intellectual disciplines. 

  • That which is founded, or established by endowment; an endowed institution or charity. 

  • Cosmetic cream roughly skin-colored, designed to make the face appear uniform in color and texture. 

  • That upon which anything is founded; that on which anything stands, and by which it is supported; the lowest and supporting layer of a superstructure; underbuilding. 

  • In solitaire or patience games, one of the piles of cards that the player attempts to build, usually holding all cards of a suit in ascending order. 

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