There is a way to find them
but it is quite complicated and time consuming, it involves the solution that Frank had for finding class names on different pages, then some further messing and mucking about, it probably isn't worth doing unless there are hundreds and hundreds of them. (I think if I remember correctly the record for the number of different class names in text editor mode (i.e # classname-nō) during Scott Swedorsk's time with CCup was a few thousand, and it took him a long time to fix it up (but that was in the days before the ability to find each page a particular class name was on) so it might not be so complicated as back then. In fact it is so complicated and time consuming to describe how to do it, I gave up trying to explain how to do it with the written word. When I get time I will see if I can do a demo video showing the steps by steps way to do it, it maybe of some use to other users too.