I'm not entirely sure the best place for this idea, but I think this could be a useful feature for Logos.
In the "right-click" context menu, when selecting a word in the original language, it would be really sweet if the context menu would have a number next to the "lemma" or similar that indicates the number of NT usages of said term. If the usage is "1", there could be a label like 'hapax' or something of the sort indicating that the term in question only has a single usage in the NT.
I've seen other threads in the forum with compilations of hapaxes in the Bible, and it would be fantastic if these were compiled into a dataset that was then used to tell someone the frequency of a term's usage in the "right-click" menu.
I'm happy to create something for this on a "uservoice" if that exists. Thanks for making great software!
With joy,
-David