I am intrigued by the Wordle website, where you can dump some text and turn it into a wordle. I don't think it is the best way to study a text, but it does show you the word frequency, excluding articles and conjunctions and some prepositions.
This one is taken from the book of Job in the ESV Bible. Like many books of the Bible, you will notice that the word God appears frequently. But which words occur most frequently in the books that never mention God [Esther and Song of Songs?]