The phrase "availability period" refers to a specific amount of time during which something is accessible or able to be used or obtained. Full definition
So if you haven't played yet... This one has one of those stilted availability periods too, starting on the 16th of this month, and running through the 15th of November. (brutalgamer.com)
Sony's PlayStation Rewards loyalty program has been in a beta phase for the past few months and was due to be opened up to all PlayStation 3 owners in a few days time, but something about the limited availability period has soured Sony on the idea for now, as the company has announced it will end the Rewards program effective March 31. (pressthebuttons.com)
Visible changes in hydrological cycle have been observed in the form of changing precipitation patterns, cropping patterns, droughts, water availability periods, frequency and intensity of heatwaves, precipitation events and weather - induced natural disasters. (chimalaya.org)