graywolf - 2:03 pm on Nov 6, 2006 (gmt 0)

According to Mozilla [lxr.mozilla.org], in "standard" mode the list of phisihing sites is updated every 30 minutes or so, although they may adjust the time in the future. I'm not sure who needs a list that's more up to date than that, so "real time" checking seems to be another way for Google collect data. The word periodically which is used to describe the update frequency is somewhat misleading IMHO.