Hi again, Trish! Welcome to the site; I hope you enjoy it. I believe the answer to the above question very much depends on (1) the dough recipe, (2) how you package the dough, and (3) the state (cleanliness) of your freezer. Highly spiced doughs are more likely to have more noticeable dissipation of flavor over time. And if the dough is packaged in permeable wraps, it will pick up off-odors from the freezer more quickly. I usually use my doughs within a 1 to 3 months of freezing them, with no noticeable change in flavor even of my gingerbread dough. But I wrap them twice in plastic and then foil, and then often bag or box them as well. Plus, I store nothing but cookie dough in my freezer to minimize other odors.
Hope this helps a bit. Interested to hear what others have to say.