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: 1375 (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 8.65 6143 80% 7679 downrated 1
20th_books 21.87 2971 80% 3714 downrated 1
wiki_math 40.54 1980 80% 2475 downrated 1
wiki_geography 0.00 — — — 0
wiki_biology 262.44 412 80% 462 downrated 2
wiki_modern_life 149.81 711 80% 889 downrated 1
wiki_arts 97.66 1458 80% 1395 2
wiki_society 197.65 589 80% 640 downrated 2
wiki_linguistics 131.55 941 80% 943 downrated 2
wiki_physical_science 135.13 857 80% 1071 downrated 1
wiki_history 76.43 1389 80% 1736 downrated 1
early_modern_science 16.09 4492 80% 5615 downrated 1
religious_translated 38.83 1989 80% 2486 downrated 1
cooking 0.00 — — — 0
legal_scotus 161.21 664 80% 775 downrated 2
eu_parliament_debates 55.72 1603 80% 2004 downrated 1
openstax_science 243.55 466 80% 530 downrated 2
openstax_society 372.36 327 80% 335 downrated 2
wpa_life_histories 26.72 2481 80% 3101 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.