Spectra of the relative rate of period change ﹩\dot{P_{k}}/ P_{k}﹩ as a function of the reduced period ﹩P_{k}[ l( l+1) ] ^{1/ 2}﹩ for g‐modes with ﹩k=1{\mbox{--}} 30﹩ and ﹩\ell =1{\mbox{--}} 3﹩ for two representative models taken from the ﹩M=0.4758+0.0002﹩ M_⊙ sequence and artificially modified by imposing a value ﹩B=0﹩ in the C‐O/He composition transition zone. Note that the scale is the same as in Fig. 9.