Base Difficulty

Base difficulty: Level 1399 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: 3956 (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 8.86 3009 17% 9386 downrated 2
20th_books 5.36 3831 17% 13537 downrated 2
wiki_math 49.71 570 17% 2612 downrated 2
wiki_geography 0.00 — — — 0
wiki_biology 0.00 — — — 0
wiki_modern_life 25.01 1793 17% 5916 downrated 2
wiki_arts 24.66 1591 17% 5622 downrated 2
wiki_society 69.11 600 17% 1827 downrated 2
wiki_linguistics 26.34 1610 17% 4866 downrated 2
wiki_physical_science 58.84 492 17% 2364 downrated 2
wiki_history 29.01 1549 17% 4666 downrated 2
early_modern_science 49.65 702 17% 2267 downrated 2
religious_translated 33.49 910 17% 3098 downrated 2
cooking 12.58 1844 17% 5200 capped 2
legal_scotus 90.03 419 17% 1391 downrated 2
eu_parliament_debates 109.93 291 17% 1100 downrated 2
openstax_science 33.64 1201 17% 4158 downrated 2
openstax_society 35.04 1171 17% 4001 downrated 2
wpa_life_histories 2.97 5736 17% 19742 downrated 2

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.