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: 1361 (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 55.12 1660 100% 1660 1
20th_books 42.07 2048 100% 2048 1
wiki_math 97.01 1265 100% 1265 1
wiki_geography 146.10 921 100% 921 1
wiki_biology 84.43 1667 100% 1667 1
wiki_modern_life 79.22 1865 100% 1865 1
wiki_arts 112.33 1227 100% 1227 1
wiki_society 164.65 802 100% 802 1
wiki_linguistics 72.01 1769 100% 1769 1
wiki_physical_science 85.09 1719 100% 1719 1
wiki_history 120.63 1080 100% 1080 1
early_modern_science 166.68 659 100% 659 1
religious_translated 37.94 2461 100% 2461 1
cooking 52.96 1715 100% 1715 1
legal_scotus 122.44 1073 100% 1073 1
eu_parliament_debates 401.38 300 100% 300 1
openstax_science 74.39 1839 100% 1839 1
openstax_society 138.89 1019 100% 1019 1
wpa_life_histories 12.77 5475 100% 5475 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.