Probability distribution function of the total energy of the individual SSHEs vs. their lifetime considering SSHEs selected using different backgrounds for the LRM (left) and HRM (right). The backgrounds are 10¹⁸ erg s^-1 and 10¹⁷ erg s^-1 for the top and bottom panels, respectively. The darker regions correspond to a high concentration of SSHEs, light yellow regions to low concentration, and white to locations where there are no SSHEs.