Frequency range (panel a) and frequency intervals Δf between stripes (panel b) as a function of CML. The red color indicates LH polarized ZPs and blue denotes RH polarized events. The lower markers on the bars, which denote one event in panel a, represent the minimum frequency and the upper markers indicate the highest recorded frequency of the zebra event. We note that there is the y-axis breaking between 1.8 and 2.9 MHz in panel b.