Base Difficulty

Base difficulty: Level 1399 edit

Level distribution for noun (geographic_place): 26: 5 249: 5 254: 17 350: 1 420: 1 1010: 1 1020: 7 1030: 1 1050: 1 1060: 1 1120: 2 1399: 18

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: 4052 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cefr C1 (5 of 6) 12000

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 23.67 1640 12% 3275 downrated 3
20th_books 5.65 2173 12% 13996 downrated 2
wiki_math 14.11 1148 12% 8000 capped 1
wiki_geography 240.50 773 100% 554 3
wiki_biology 48.08 1113 12% 2677 downrated 2
wiki_modern_life 23.68 696 12% 5568 downrated 1
wiki_arts 14.48 1186 12% 9488 downrated 1
wiki_society 0.00 — — — 0
wiki_linguistics 6.87 2221 12% 9000 capped 1
wiki_physical_science 67.15 1157 12% 2071 downrated 2
wiki_history 7.35 2323 12% 9000 capped 1
early_modern_science 125.52 425 12% 908 downrated 3
religious_translated 11.51 1361 12% 8432 downrated 2
cooking 0.00 — — — 0
legal_scotus 0.73 9147 12% 20000 capped 1
eu_parliament_debates 0.00 — — — 0
openstax_science 33.75 1524 12% 3388 downrated 2
openstax_society 9.29 1865 12% 11000 capped 1
wpa_life_histories 3.23 2968 12% 20000 capped 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.