Kernel density estimate (KDE) plots and histograms of the average period, $\overline{P}$, and average amplitude, $\overline{A}$, of the 468 fibrils in our sample that show POS and LOS oscillations. The panels display the quantities indicated in the axis labels. The histogram distribution for each quantity is shown in the side plots that correspond to their axis. The Pearson correlation coefficient, r, is given in the corner of the left-hand panels.