Base Difficulty

Base difficulty: Level 456 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: 845 (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 73.84 1151 80% 1213 downrated 2
20th_books 54.69 1528 80% 1576 downrated 2
wiki_math 47.12 1805 80% 2256 downrated 1
wiki_geography 230.21 560 80% 558 2
wiki_biology 42.43 2560 80% 3200 downrated 1
wiki_modern_life 79.86 1469 80% 1836 downrated 1
wiki_arts 395.12 276 80% 281 downrated 2
wiki_society 342.10 302 80% 331 downrated 2
wiki_linguistics 402.85 300 80% 307 downrated 2
wiki_physical_science 134.14 1092 80% 1053 2
wiki_history 402.29 218 80% 252 downrated 2
early_modern_science 164.63 600 80% 651 downrated 2
religious_translated 38.71 1999 80% 2499 downrated 1
cooking 0.00 — — — 0
legal_scotus 54.40 1838 80% 2298 downrated 1
eu_parliament_debates 79.21 1196 80% 1495 downrated 1
openstax_science 122.68 1206 80% 1105 2
openstax_society 368.39 315 80% 335 downrated 2
wpa_life_histories 20.08 3239 80% 4049 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.