Age-estimate relative errors as a function of the true mass (left panel), relative age (central panel), and metallicity [Fe/H] (right panel) of the stars without δν observational constraint (blue solid line), or adopting δν with observational errors of 5% and 2% (purple dashed line and green dot-dashed line respectively). The lines show the 1σ error envelope. A positive relative error indicates that the reconstructed age of the star is overestimated with respect to the true one.