Left: magnetic frequency splitting calculated at the central mode frequency ν_{1, g, max} versus the age of the different evolutionary stages reported in the right panel for Z = 0.02, M_⋆ ∈ {1, 1.5, 2, 3} M_⊙. Middle: magnetic frequency splitting calculated at the central mode frequency ν_{1, g, max} for the different evolutionary stages and masses reported in the right panel. Right: Hertzsprung-Russell diagram corresponding to the colour-coded Z = 0.02, M_⋆ ∈ {1, 1.5, 2, 3} M_⊙ stars. The star symbols indicate the position of the star at which measurements are reported in the left and middle panels.