Pseudo-translational and pseudo-rotational contributions are vibrational motions be-tween the core region and the environment that correspond to translational or rotational motions of the core region surrounded by a rigid environment. In our previous work, we demonstrated that normal modes with substantial pseudo-translational or pseudo-rotational contributions are poorly described in the PHVA approximation and, consequently, should be removed. To identify pseudo-translation and pseudo-rotation, we use the absolute square of the dot product between the normalized eigenvectors and normalized vectors corresponding to the translational and rotational motion of the atoms in the core region (in Cartesian coordinates). In Fig. , we present the average pseudo-translational and pseudo-rotational contributions across all 2890 snapshots for an inner-sphere size of 8 Å and an outer-sphere size of 30 Å. The results reveal that the eight lowest-frequency modes have substantial pseudotranslational and pseudo-rotational contributions. The maximum values and standard deviations show that the degree of pseudo-translational and pseudo-rotational contributions highly depends on the specific configuration. Therefore, it is crucial to consider the entire set of snapshots when identifying pseudo-translational and pseudo-rotational contributions.