Never. Unfortunately, we are not going to get something like what we had in 2012 where there was a regular schedule. Three? days of Lotto starts.
According to Sapience the Lotto is something that will be done occasionally when they feel like it. The "feel like it" does not occur very often. There were probably only three Lottos in the past month.
Some people have created a Lotto notifier app so that they do not have to keep checking the Lotto page to see if it is time for another Lotto.
Unless stated otherwise, all content in this post is My Personal Opinion.