[tlhIngan Hol] duration to be used with the {qaStaHvIS}

Is there a minimum of time, which needs to be happening, for the {qaStaHvIS} to be able to be used ? For example, can I say {qaStaHvIS wa' lup} ? Or do I need to use the {qaStaHvIS} only in reference to longer durations of time ? I don't see any reason, for any restriction to exist, but I'd like to make certain. ~ bara'qa'