ν versus $\sqrt{\text{Δ}v}$ diagram for EPIC 221788083, with frequencies ranging from 7.9 to 17.1 μHz attributed to prograde sectoral modes with m =1. Magenta squares indicate modes with “jumps” in the radial order n, with Δ_kn of 2, 3, …, represented by colored lines starting with orange. Red squares indicate modes with Δ_kn = 1 or corrected by a factor of $1/\sqrt{{\text{Δ}}_{k}n}$, yellow arrows indicate when this correction was applied. Open black points were discarded. The solid blue line represents the first iteration, and the purple dashed line indicates the inclination after convergence. The intercept of the dashed line with the 0.0 line estimates the average rotation frequency, and the slope measures P₀. For EPIC 221788083, the values obtained are v_rot = 6.1 ± 0.1 μHz, P₀ = 4.9 ± 0.2 · 10³ s (see Takata et al. 2020).