Report on initial faculty access to semester course

Is there a recommended time for the creation of semester courses added for faculty access?
For instance, we currently allow faculty access to their courses 30 days prior to the semester start date. We did have it set at 90 days and this tended to cause major issues with course duplications and cross-listing due to constant changes in Colleague. Is there a report we can run to see how many professors actually open their courses before 30 days? I want to give ample time to prepare course content without creating havoc in the system. I do create sandboxes if asked so faculty can prepare. Any other suggestions would be greatly