I don't have to try to prove YOUR point...you are the one trying to advance some type of "theory" (that NU is affected more than others by playing a team with a "new system"). If you cannot find data to prove your theory we should go on the assumption that it is certainly an unproven theory.You should look it up and see but even if it holds true,
I can however help you out by providing you some relevant data. In recent years about 1/5 of FBS teams change HC per season. But many others change coordinators (the coordinator may have moved on to a more attractive job, or the HC may have made the change)...the result in terms of schematics may be the same as a HC change, since a new coordinator would almost certainly install a new "system"...And even if that only affects one side of the field, it presumably may also create a big problem to NU...finally the coaching staff may just install a new system (even with no significant staff changes...see how the spread was installed at NU)...putting together all cases (new HC, same HC with new coordinator(s), same staff but still major system change), "new system" may cover a pretty high percentage of FBS teams, say 50-60%.
If for NU playing early in the season against a team with a new system is a problem there should be plenty of data points to show it. Go and find them!