Base Difficulty

Base difficulty: Level 1399 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: 5113 (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 1.42 8137 20% 20000 capped 1
20th_books 1.51 7554 20% 20000 capped 1
wiki_math 10.83 2886 20% 7481 downrated 2
wiki_geography 0.00 — — — 0
wiki_biology 0.00 — — — 0
wiki_modern_life 150.37 249 20% 679 downrated 2
wiki_arts 22.52 2322 20% 6133 downrated 2
wiki_society 13.50 3397 20% 9875 downrated 2
wiki_linguistics 12.71 3075 20% 8275 downrated 2
wiki_physical_science 42.73 1135 20% 3412 downrated 2
wiki_history 6.77 3872 20% 9000 capped 1
early_modern_science 0.00 — — — 0
religious_translated 0.00 — — — 0
cooking 7.89 2052 20% 5200 capped 1
legal_scotus 23.43 1959 20% 5142 downrated 2
eu_parliament_debates 3.29 4213 20% 11000 capped 1
openstax_science 39.54 1264 20% 3514 downrated 2
openstax_society 8.26 3024 20% 11000 capped 1
wpa_life_histories 0.00 — — — 0

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.