Fourier transform of frequency spectra in a 2 M_⊙ model rotating at 0.5 Ω_C. Each row corresponds to a different number of selected modes, as indicated on the left, and each column to a different inclination, as stated above. The red, continuous and discontinuous, vertical lines correspond to the large frequency separation, Δ, and various fractions of this value: Δ/4, Δ/3, and Δ/2. The green, dotted and dashed, vertical lines correspond to Ω and 2Ω, respectively.