PDF of the time between LWs and the nearest MH center point. The PDF shows how far from MHs the LWs occur. The histogram shows LW counts normalized by the size of the bin and total counts. The time is taken from the start of a LW to the nearest MH center point. In the vicinity of MHs, most of the LWs occur inside the holes, which corresponds to the first two bins. The median size of the MHs is indicated by the vertical dashed red line.