Base Difficulty

Base difficulty: Level 275 edit

Level distribution for noun (concept_idea): 19: 2 26: 1 27: 1 221: 28 270: 30 274: 30 275: 28 280: 25 300: 1 360: 1 380: 2 1000: 1 1030: 1 1060: 5 1070: 6 1110: 4 1120: 4 1399: 66

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: 2115 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
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 104.57 507 50% 941 downrated 2
20th_books 83.19 646 50% 1204 downrated 2
wiki_math 82.57 821 50% 1642 downrated 1
wiki_geography 0.00 — — — 0
wiki_biology 0.00 — — — 0
wiki_modern_life 0.00 — — — 0
wiki_arts 35.02 1972 50% 3944 downrated 1
wiki_society 139.09 550 50% 902 downrated 2
wiki_linguistics 14.24 3602 50% 7204 downrated 1
wiki_physical_science 0.00 — — — 0
wiki_history 35.25 1956 50% 3912 downrated 1
early_modern_science 95.87 638 50% 1128 downrated 2
religious_translated 475.01 146 50% 275 downrated 2
cooking 0.00 — — — 0
legal_scotus 21.66 2658 50% 5316 downrated 1
eu_parliament_debates 28.74 1858 50% 3716 downrated 1
openstax_science 0.00 — — — 0
openstax_society 45.68 1516 50% 3032 downrated 1
wpa_life_histories 30.59 1582 50% 3164 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.