Detected period-spacing patterns of KIC 3228863. Top: Lomb-Scargle periodogram (black) with the g modes (red dotted lines) that form a (k, m) = (0, 1) pattern and a (-2,-1) pattern on the left and right hand side, respectively. The grey dotted line indicates an orbital harmonic. Bottom: Period spacing as a function of pulsation period for the detected g-mode patterns. Dotted lines indicate gaps in the patterns.