For various preset terms, this shows the raw count, frequency (per 10,000 words), and TF-IDF (times 100,000) for each chapter of the published Silmarillion.
Melkor vs Morgoth vs Fëanor vs Silmaril(s) counts frequency tf-idf
Weapons counts frequency tf-idf
Beren vs Lúthien counts frequency tf-idf
Colours counts frequency tf-idf
Valinor vs Doriath vs Gondolin vs Númenor counts frequency tf-idf