The differences in orbital frequencies between the A.-C. Eilers et al. (2019) and the J. Bovy (2015) potentials (Ω_Bovy–Ω_Eilers) for member stars of different substructures vs. orbital pericenters under the A.-C. Eilers et al. (2019) potential. Different substructures are indicated by different colors and markers. Left and right panels show the frequency differences in the r and ϕ directions, respectively.