Prominent P Cygni features of SN 2018ec at two selected epochs. The zero velocity is set to the rest wavelength of the shortest wavelength component of each line blend, i.e., at 5890 Å for the Na I D (blue), 8498 Å for the Ca II near-IR triplet (orange), and 10683 Å for a C I blend (red). Velocities at absorption minima shown by the features are surprisingly similar, with ∼8500 km s⁻¹ around ∼1 month from the estimated maximum light and ∼7000 km s⁻¹ at ∼2 months from light curve peak, with the latter epoch showing somewhat more scatter, which can (partly) arise from the lower signal-to-noise ratio of the spectra. The spectra are binned by a factor of 4, for clarity and the line profiles are normalised to match the flux level of both their absorption minimum and emission peak within a given epoch.