We showed how the pseudo-translational and pseudo-rotational contributions substantially affect the eight lowest-frequency normal modes that thus should be removed. Additionally, our analysis with regards to basis-set incompleteness, found the basis-set error not to exceed 14.5 cm -1 . In contrast, the analysis of the size of the polarizable part of the environment and the configurational sample size revealed that the frequency errors can be kept below 1 cm -1 at a reasonable computational cost. Adding up the average errors for the frequencies, their standard deviations, and the maximum error for the choices made in our workflows, leads to 4.0 ± 3.7 (15.8) cm -1 . The basis-set errors in the intensities were quite large for acetone in vacuum, indicating a major impact on the spectra even with pcseg-3 when compared to pcseg-4. For acetone in water, the errors were quite small when comparing pcseg-2 to pcseg-3 but would presumably be similar to the acetone in vacuum case if compared to pcseg-4. The errors in intensities introduced by limiting the size of the polarizable part of the environment and the sample size were, in general, rather small, already when only considering a polarizable solvent sphere with a radius of 8 Å and 25 snapshots.