These are histograms of the timestamps for all entries posted to three MemeStreams:
Jeremy, from the first post on October 8, 2001 through the post previous to this one on March 12, 2005;
Decius, from the first post on September 5, 2001 through the latest post on March 11, 2005; and
Rattle, from the first post on September 8, 2001 through the latest post on March 8, 2005.
You'll notice significant differences among the three graphs.
The X axis shows time of day (in Pacific time). Each day of the week is shown in a different row and color along the Y axis. The height of each bar in the Z axis represents the cumulative number of posts bearing a timestamp of the corresponding day and time.
Meme Maps for 'Jeremy', 'Decius', and 'Rattle', September 2001 - March 2005