Ideally, the update schedule is as follows. There may be some deviations from this schedule due to Real Life® interference.
Monday through Friday, there will be two reviews added per day. One will come from a selection of newer reading, one will come from a selection of archived reviews not yet formatted for the site. There are approximately 50 or so reviews waiting to be formatted. Once those are up, the frequency may decrease, though they may be replaced by reviews of older works not yet covered. I don't read a book a day, so reviews of new material may decrease in frequency at some undetermined point in the future.
New columns are published on Mondays and Thursdays. The aim is to get them online before noon Pacific Daylight or Standard time, whatever is current.