From my official research these two had a lot of words in common which is super suprising that this had around 300-60 word count approximation the list of words I found within my reasearch upon Lord of The Rings was huge compared to Harry Potter's word count it was super huge and Harry Potter's word count was a follow up upon this many different words were one of the same
The use of N-grams they have a huge amount of them combined Example: "out of the"
See how many times from these photo's using the comparison of getting higher
Each time you upgrade the n-grams they tend to get smaller and smaller even from big hits whether it'd be from the Harry Potter books or rather the Lord Of The Ring books
No matter the upgrade the words grouping becomes lower and lower as provided in my resource N-gram researcher Antconc (Ain't this a little treat to look at? -Deadpool;))
Here is N-grams 2 from both prompts
Here is N-grams 3 from both prompts as previously mentioned
This is my 3D made for Digit 100!