Base Difficulty

Base difficulty: Level 274 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: 927 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cefr A2 (2 of 6) 2100

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 75.56 1221 100% 1221 1
20th_books 90.87 1124 100% 1008 2
wiki_math 131.66 1580 100% 839 2
wiki_geography 68.53 2044 100% 2044 1
wiki_biology 56.29 4098 100% 2124 2
wiki_modern_life 124.95 2223 100% 1182 2
wiki_arts 109.02 1939 100% 1256 2
wiki_society 256.61 875 100% 530 2
wiki_linguistics 281.07 828 100% 470 2
wiki_physical_science 112.95 2356 100% 1236 2
wiki_history 121.28 1073 100% 1073 1
early_modern_science 45.18 2438 100% 2438 1
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 156.44 1341 100% 812 2
eu_parliament_debates 938.53 134 100% 122 2
openstax_science 187.85 1398 100% 734 2
openstax_society 370.38 515 100% 366 2
wpa_life_histories 37.20 2390 100% 2390 1

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.