Characteristic frequencies S_l/2π for l = 1 and 2 (dashed and dot-dashed; cf. Eq. (1)) and N/2π (solid; cf. Eq. (2)) in the ASTEC 1 M_⊙, 7 R_⊙ model. The horizontal red band marks the region around ν_max, the estimated frequency of maximum oscillation power (cf. Eq. (8)), where observed modes are expected. The blue and orange areas indicate the corresponding regions of g- and p-mode behaviour, for l = 1. The glitch in the buoyancy frequency is caused by the near-discontinuity in the hydrogen abundance resulting from the penetration, during the first dredge-up, of the convective envelope into a region where the composition has been modified by nuclear reactions (see also Paper I).