Base Difficulty

Base difficulty: Level 370 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: 2179 (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 72.92 1375 100% 1191 2
20th_books 57.00 1598 100% 1598 1
wiki_math 23.10 3301 100% 3301 1
wiki_geography 49.79 2755 100% 2755 1
wiki_biology 37.16 3460 100% 3460 1
wiki_modern_life 91.03 1617 100% 1617 1
wiki_arts 227.96 537 100% 537 1
wiki_society 54.65 2547 100% 2547 1
wiki_linguistics 26.87 3714 100% 3714 1
wiki_physical_science 33.89 3664 100% 3664 1
wiki_history 44.99 3021 100% 3021 1
early_modern_science 36.07 2928 100% 2928 1
religious_translated 23.81 3566 100% 3566 1
cooking 46.20 1859 100% 1859 1
legal_scotus 42.50 2694 100% 2694 1
eu_parliament_debates 21.14 3617 100% 3617 1
openstax_science 27.43 4047 100% 4047 1
openstax_society 32.24 3688 100% 3688 1
wpa_life_histories 23.08 3459 100% 3459 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.