Share over time. To better understand the shape of the data we construct an array, in which the vertical axis represents the passage of time (from August at the top, to January at the bottom), the cells in the horizontal from left to right are each one of the first 200 sources (we take this smaller sample from the top contributors from the 1000 sources, for simplicity of analysis and visualization), and the colors encode the traffic intensity (yellow is high, blue is low, red is no data).