Posterior distribution of the frequencies at 1 M_⊙, 1.4 M_⊙ and 2 M_⊙ for the p₁-mode. The left panel refers to the prescription described in Sec. 5.3 while the right is obtained by inserting the R_X(M) relation of each model in (15) with the QU coefficients a_i of Sotani (2021). The frequencies in the right panel have a narrower distribution, meaning that the prescription in (17) is necessary to make the spread of our synthetic full GR frequencies similar to the one found by Sotani (2021).