This effect has been first noted by W. T. King in his early works. 47,48, The author had described the frequency sum rule and understood the electronic energy behind it: 47 "the effective Cartesian force constants found by this sum rule are independent of the nuclear repulsion energy and consequently depend only on the electron distribution in the molecule " An additional conclusion deals with the Born-Oppenheimer approximation inherent in his work. "Because the nuclear-repulsion energy, (…) is an additive term in the potential function and because it satisfies Laplace's equation, it will vanish in the calculation of [ 2 E] by any method. (…)" The far reaching consequences of King's findings have not been explored until in this present work. The existing apparatus of the Conceptual DFT and contemporary computational tools, allowed for the development both of the theory and applications of this effect oriented for practical chemistry.