Adobe does not pre-announce release dates, so you could guess at an interval of roughly 2 months from the last release, based only on the time between the 2014.0 and 2014.1 updates...
2014.0 - June
2014.1 - August
Next one... October???
I had thought we might be seeing interim minor releases (e.g., for individual bugfixes), but that's not been not the case so far.
-Noel