Base Difficulty

Base difficulty: Level 265 edit

Level distribution for noun (mental_construct): 265: 27 300: 1 390: 2 460: 1 1060: 6 1070: 1 1120: 1 1399: 30

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: 533 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
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 745.95 107 50% 159 downrated 2
20th_books 866.39 94 50% 137 downrated 2
wiki_math 82.00 831 50% 1662 downrated 1
wiki_geography 53.25 1290 50% 2580 downrated 1
wiki_biology 208.37 265 50% 530 downrated 1
wiki_modern_life 51.20 1438 50% 2876 downrated 1
wiki_arts 175.26 461 50% 696 downrated 2
wiki_society 297.99 226 50% 367 downrated 2
wiki_linguistics 108.56 610 50% 1220 downrated 1
wiki_physical_science 170.44 385 50% 770 downrated 1
wiki_history 193.91 345 50% 586 downrated 2
early_modern_science 209.78 315 50% 513 downrated 2
religious_translated 458.56 244 50% 244 2
cooking 51.27 1129 50% 2258 downrated 1
legal_scotus 87.43 810 50% 1378 downrated 2
eu_parliament_debates 69.27 1157 50% 1467 downrated 2
openstax_science 78.96 903 50% 1806 downrated 1
openstax_society 194.70 545 50% 703 downrated 2
wpa_life_histories 283.79 227 50% 411 downrated 2

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.