Distributions of the rise (top) and decay (bottom) time of flare events. All samples are represented by a blank bar box, and the shaded area is the main sequence stars. The X-axes of the left panels are real values, and the vertical dashed and dotted lines indicate the statistical mean and median values of all samples, respectively, as listed in Table 4. The right axis of the right panel shows log-normal values, and the vertical dashed and dotted lines indicate the statistical mean and median values, respectively, of the lnT_rise and lnT_decay values for the whole sample. The brown line is the normal distribution fitting of the bar graph of all samples, while the blue line is the same but for the main sequence stars.