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: 1806 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
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 18.88 998 20% 4990 downrated 1
20th_books 17.50 1100 20% 5500 downrated 1
wiki_math 109.94 374 20% 1085 downrated 2
wiki_geography 42.76 592 20% 2960 downrated 1
wiki_biology 63.65 377 20% 1885 downrated 1
wiki_modern_life 45.17 540 20% 2700 downrated 1
wiki_arts 89.66 438 20% 1368 downrated 2
wiki_society 170.13 207 20% 667 downrated 2
wiki_linguistics 430.37 89 20% 271 downrated 2
wiki_physical_science 50.35 548 20% 2740 downrated 1
wiki_history 28.15 945 20% 4725 downrated 1
early_modern_science 14.05 1643 20% 8215 downrated 1
religious_translated 26.02 819 20% 4095 downrated 1
cooking 0.00 — — — 0
legal_scotus 95.28 318 20% 1187 downrated 2
eu_parliament_debates 7.27 2561 20% 11000 capped 1
openstax_science 36.16 785 20% 3925 downrated 1
openstax_society 87.47 670 20% 1533 downrated 2
wpa_life_histories 4.97 3265 20% 16325 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.