Base Difficulty

Base difficulty: Level 1399 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: 1261 (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 30.95 4070 100% 2250 3
20th_books 12.53 6761 57% 4690 2
wiki_math 106.61 1303 57% 1150 2
wiki_geography 38.42 3537 100% 3537 1
wiki_biology 0.00 — — — 0
wiki_modern_life 28.65 4678 100% 4678 1
wiki_arts 0.00 — — — 0
wiki_society 95.81 2364 57% 1431 3
wiki_linguistics 117.99 1721 100% 1045 2
wiki_physical_science 0.00 — — — 0
wiki_history 48.09 2833 100% 2833 1
early_modern_science 24.29 4190 57% 3810 2
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 156.34 898 57% 741 4
eu_parliament_debates 1568.37 105 100% 74 2
openstax_science 0.00 — — — 0
openstax_society 61.54 3760 100% 1907 2
wpa_life_histories 8.63 4496 57% 7868 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.