Base Difficulty

Base difficulty: Level 1399 edit

Level distribution for noun (place_name): 1: 1 10: 1 24: 6 26: 1 114: 2 115: 2 219: 1 249: 1 255: 5 278: 3 299: 1 405: 6 406: 1 1078: 11 1203: 3 1204: 3 1207: 1 1210: 1 1212: 1 1221: 4 1222: 1 1399: 1

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: 6557 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
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 0.57 9987 11% 20000 capped 1
20th_books 0.00 — — — 0
wiki_math 3.97 2519 11% 8000 capped 1
wiki_geography 0.00 — — — 0
wiki_biology 31.00 950 11% 4497 downrated 2
wiki_modern_life 19.07 1501 11% 7760 downrated 2
wiki_arts 0.00 — — — 0
wiki_society 0.00 — — — 0
wiki_linguistics 27.64 760 11% 4732 downrated 2
wiki_physical_science 108.72 127 11% 956 downrated 2
wiki_history 0.00 — — — 0
early_modern_science 20.83 916 11% 5493 downrated 2
religious_translated 1.78 4709 11% 10400 capped 1
cooking 0.00 — — — 0
legal_scotus 1.44 8275 11% 20000 capped 2
eu_parliament_debates 0.00 — — — 0
openstax_science 58.10 405 11% 2279 downrated 2
openstax_society 0.00 — — — 0
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.