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by abeppu 1145 days ago
Yeah I get the count vs area distinction, but I think the point would have been more cleanly communicated with e.g. a stacked barchart with failures by quarter. With circles, the filled area over any span of the x-axis is not solely due to failures which happened during the corresponding time period. So the area above a short span in early 2010 includes area contributed by WaMu, which happened in Sept 2008.