Base Difficulty

Base difficulty: Level 1110 edit

Level distribution for noun (concept_idea): 19: 2 26: 1 27: 1 221: 28 270: 30 274: 30 275: 28 280: 25 300: 1 360: 1 380: 2 1000: 1 1030: 1 1060: 5 1070: 6 1110: 4 1120: 4 1399: 66

Per-Language Difficulty Overrides

No difficulty overrides set. The base difficulty level will be used for all languages.

Add Difficulty Override
-1 to exclude, 1-1399 for level
Frequency and Tier Signals
Combined Frequency Rank: 1396 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cefr B1 (3 of 6) 4200

Rank used = synthetic rank this tier contributes to the combined frequency rank (lower = more common).

Corpus Frequency
Corpus Freq (per M) Best form Share Zipf rank Forms
19th_books 39.98 1805 80% 2256 downrated 1
20th_books 17.33 3592 80% 4490 downrated 1
wiki_math 75.76 1496 80% 1337 2
wiki_geography 27.48 3926 80% 4908 downrated 1
wiki_biology 27.71 3628 80% 4535 downrated 1
wiki_modern_life 107.17 1815 80% 1373 2
wiki_arts 173.11 916 80% 776 2
wiki_society 255.65 577 80% 505 2
wiki_linguistics 359.00 439 80% 363 2
wiki_physical_science 81.13 2197 80% 1679 2
wiki_history 83.05 1895 80% 1619 2
early_modern_science 85.66 1295 80% 1294 2
religious_translated 43.67 3077 80% 1989 2
cooking 0.00 — — — 0
legal_scotus 82.57 2060 80% 1427 2
eu_parliament_debates 276.74 568 80% 438 2
openstax_science 123.02 1443 80% 1096 2
openstax_society 190.48 794 80% 739 2
wpa_life_histories 0.00 — — — 0

Best form = the single best-ranked form in the corpus, share-blind — how the spelling itself ranked. Share = how much of that spelling belongs to this lemma, when several senses compete for it. Zipf rank = all the forms combined (variant spellings included), each scaled by its share, and what feeds the combined frequency rank. Combining forms improves on the best form, but a share below 100% pushes the other way and usually wins: a sense holding a small slice of a common spelling is a rare word, so its rank lands downrated below the best form — and once it falls past what the corpus can support it is capped at the rank an unlisted word would get.