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: 765 (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 193.64 487 77% 512 downrated 2
20th_books 186.23 498 77% 543 downrated 2
wiki_math 279.84 390 77% 507 downrated 1
wiki_geography 30.47 3448 77% 4482 downrated 1
wiki_biology 173.74 727 77% 774 downrated 2
wiki_modern_life 86.54 1308 77% 1700 downrated 1
wiki_arts 180.94 512 77% 666 downrated 1
wiki_society 334.11 267 77% 323 downrated 2
wiki_linguistics 181.48 632 77% 704 downrated 2
wiki_physical_science 94.42 1195 77% 1554 downrated 1
wiki_history 102.21 1001 77% 1301 downrated 1
early_modern_science 124.71 1006 77% 914 2
religious_translated 491.36 303 77% 225 2
cooking 0.00 — — — 0
legal_scotus 163.93 593 77% 771 downrated 1
eu_parliament_debates 126.84 715 77% 929 downrated 1
openstax_science 146.74 957 77% 941 2
openstax_society 261.69 397 77% 476 downrated 2
wpa_life_histories 57.05 1310 77% 1703 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.