Visual representation of the frequency shift incurred on the truncated frequencies for model ℳ. The fractional frequency shift (ν_F − ν_T)/ν_T between the full (ν_F) and truncated (ν_T) frequencies is plotted against ν_T for the dipole and quadrupole modes, shown by the red and blue lines, respectively. The grey profile shows the resulting generalised correction for model ℳ overplotted, for which its value is subsequently subtracted from all dipole acoustic resonances to provide the red triangles. The uncertainty on the correction for each dipole mode is indicated, as well as the minimal size of the scanning interval boundary as the shaded beams in the respective colour.