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: 737 (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 147.95 778 100% 630 2
20th_books 82.24 1433 100% 1084 2
wiki_math 24.25 3231 100% 3231 1
wiki_geography 0.00 — — — 0
wiki_biology 0.00 — — — 0
wiki_modern_life 0.00 — — — 0
wiki_arts 77.64 2923 100% 1736 2
wiki_society 150.68 1548 100% 938 2
wiki_linguistics 41.92 2749 100% 2749 1
wiki_physical_science 0.00 — — — 0
wiki_history 103.82 1877 100% 1294 2
early_modern_science 172.76 783 100% 637 2
religious_translated 116.91 1092 100% 843 2
cooking 0.00 — — — 0
legal_scotus 1276.04 88 100% 81 3
eu_parliament_debates 486.69 285 100% 243 2
openstax_science 0.00 — — — 0
openstax_society 140.13 1849 100% 985 2
wpa_life_histories 44.82 2503 100% 1823 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.