Base Difficulty

Base difficulty: Level 1399 edit

Level distribution for noun (quality_attribute): 370: 12 405: 3 450: 1 456: 1 1000: 2 1030: 1 1040: 2 1050: 1 1070: 4 1120: 2 1399: 50

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: 4824 (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 2.16 6143 20% 20000 capped 1
20th_books 5.47 2971 20% 14855 downrated 1
wiki_math 10.13 1980 20% 8000 capped 1
wiki_geography 0.00 — — — 0
wiki_biology 65.61 412 20% 1848 downrated 2
wiki_modern_life 37.45 711 20% 3555 downrated 1
wiki_arts 24.42 1458 20% 5581 downrated 2
wiki_society 49.41 589 20% 2561 downrated 2
wiki_linguistics 32.89 941 20% 3774 downrated 2
wiki_physical_science 33.78 857 20% 4285 downrated 1
wiki_history 19.11 1389 20% 6945 downrated 1
early_modern_science 4.02 4492 20% 10400 capped 1
religious_translated 9.71 1989 20% 9945 downrated 1
cooking 0.00 — — — 0
legal_scotus 40.30 664 20% 3098 downrated 2
eu_parliament_debates 13.93 1603 20% 8015 downrated 1
openstax_science 60.89 466 20% 2119 downrated 2
openstax_society 93.09 327 20% 1342 downrated 2
wpa_life_histories 6.68 2481 20% 12405 downrated 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.