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: 2437 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cefr B1 (3 of 6) 4200

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 57.62 1976 100% 1462 2
20th_books 72.78 1616 100% 1192 2
wiki_math 0.00 — — — 0
wiki_geography 0.00 — — — 0
wiki_biology 158.03 862 100% 862 1
wiki_modern_life 33.06 4191 100% 4191 1
wiki_arts 58.15 2391 100% 2391 1
wiki_society 49.34 2835 100% 2835 1
wiki_linguistics 0.00 — — — 0
wiki_physical_science 36.40 3490 100% 3490 1
wiki_history 64.12 2141 100% 2141 1
early_modern_science 42.15 2567 100% 2567 1
religious_translated 174.98 764 100% 599 2
cooking 0.00 — — — 0
legal_scotus 17.20 5017 100% 5017 1
eu_parliament_debates 50.89 2040 100% 2040 1
openstax_science 91.43 1517 100% 1517 1
openstax_society 60.76 2249 100% 2249 1
wpa_life_histories 14.56 5009 100% 5009 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.