High-frequency region (f ≥ 5 d⁻¹) of the Fourier spectrum for the full Kepler LC observations of KIC 6951642. (a) Different types of combinations are detected among the significant frequencies (S/N ≥ 4; Table A.3). (b) Detection of rotationally split p modes in the interval (10.5–17) d⁻¹ (Δf_rot ≡ f₃ = 0.721 d⁻¹) (Table 8).(c) Detection of rotationally split values for the multiplets in panel b (Table 8). (d) The echelle diagram for the detected multiplets in panel b. Grey circles: the significant high-frequencies. The marker’s size is linked to the amplitude of the significant frequency. Black circles: The frequencies whose TDs show a similar long-term time delay trend (TDr in Table A.3). Brown circles: The frequencies showing incompatibility with general long-term time delay trend (TDir in Table A.3). Colours and indicators follow the descriptions of panels b and c.