When I do a search on a word in the Bible, and then graph the results, one of the options is to graph the number of hits in the book / number of verses in the book. Actually the results are portraying the number of verses with hits in the book / number of verses in the book - same as in Libronix. The results are also presented as a whole number rather than as a percentage (i.e. 10.3603603603604 rather than 10.4%).
I would also like to see the option of graphing the number of hits in the book / number of words in the book as was possible in Libronix.
I noticed another difference between the search totals and the graph results of Logos 4 and Libronix. In Libronix, when you did a search on a lemma in the ESV Interlinear, the results returned the number of occurrences in the Hebrew text, regardless of whether the ESV translated every word or not (ellipses or green dots in the Interlinear were counted). In Logos 4, the search totals for lemmas reflect only the number of occurrences that have equivalents in the English text, not the number of occurrences in the actual Hebrew text. You have to do a search on the Hebrew text to know the total including the untranslated words. I would prefer the way that Libronix calculated the totals, because I believe it is better to give the total occurrences of the lemma regardless of whether they were translated or not in the English.