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: 287 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
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 47.34 2432 100% 1732 2
20th_books 55.95 1933 100% 1462 2
wiki_math 3480.82 31 100% 30 2
wiki_geography 67.54 2078 100% 2078 1
wiki_biology 98.50 1427 100% 1427 1
wiki_modern_life 166.17 1035 100% 847 2
wiki_arts 371.67 404 100% 320 2
wiki_society 1129.54 107 100% 83 2
wiki_linguistics 435.85 417 100% 296 2
wiki_physical_science 1139.33 98 100% 86 2
wiki_history 532.64 231 100% 199 2
early_modern_science 431.70 279 100% 250 2
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 172.43 860 100% 727 2
eu_parliament_debates 16.15 4273 100% 4273 1
openstax_science 290.09 585 100% 476 2
openstax_society 600.21 250 100% 198 2
wpa_life_histories 7.62 8014 100% 8014 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.