New headwords a reader must add at each tier: DCC core 1000 → Cicero, Divinatio in Caecilium → MGH Libelli de Lite.
1 · Dickinson Latin Core
foundation · all eras
997
starting headwords
2 · Divinatio in Caecilium
Cicero · 1st c. BCE · classical
+466
new beyond the core
3 · Libelli de Lite
MGH · 11th–12th c. · medieval
+5,026
new beyond core + Divinatio
The Libelli jump is ~10× the Divinatio's — but front-loaded: about 30% of its 5,026 new words occur only once, while the top ~300 cover half of all new-word occurrences and the top ~1,000 cover ~77%. The active core is a few hundred ecclesiastical terms with a long rare tail.
Method & caveats.
Lemmatised with the Latin-macronizer database (enclitic splitting, frequency disambiguation, proper-noun routing) and compared against the DCC Latin Core (997 headwords). Divinatio from clean Perseus XML (±5–10). The Libelli is noisy Internet Archive OCR in medieval orthography — read 5,026 as “on the order of 5,000 classical-recognisable headwords”; apparatus abbreviations, Roman numerals and medieval spellings (aecclesia=ecclesia) limit precision (~26% of OCR tokens unrecognised).
Source: DCC Latin Core Vocabulary.