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: 1678 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cefr A1 (1 of 6) 800

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 167.49 378 17% 582 downrated 2
20th_books 138.47 341 17% 721 downrated 2
wiki_math 0.00 — — — 0
wiki_geography 0.00 — — — 0
wiki_biology 0.00 — — — 0
wiki_modern_life 26.84 4925 100% 4925 1
wiki_arts 72.41 2214 100% 1919 2
wiki_society 105.90 1557 100% 1347 2
wiki_linguistics 0.00 — — — 0
wiki_physical_science 0.00 — — — 0
wiki_history 39.01 2913 17% 3356 downrated 2
early_modern_science 26.14 2230 17% 3624 downrated 2
religious_translated 35.42 1676 17% 2532 downrated 2
cooking 0.00 — — — 0
legal_scotus 8.30 7613 100% 7613 1
eu_parliament_debates 23.44 2362 17% 3240 downrated 2
openstax_science 23.62 3851 17% 4310 downrated 2
openstax_society 116.02 1345 100% 1202 2
wpa_life_histories 27.30 1293 17% 3009 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.