Base Difficulty

Base difficulty: Level 249 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: 450 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
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 191.47 607 100% 503 2
20th_books 219.17 536 100% 466 2
wiki_math 18.48 3799 100% 3799 1
wiki_geography 783.89 151 100% 135 2
wiki_biology 324.00 370 100% 370 1
wiki_modern_life 286.18 466 100% 421 2
wiki_arts 127.85 1452 100% 1073 2
wiki_society 316.92 422 100% 368 2
wiki_linguistics 68.25 2776 100% 1590 2
wiki_physical_science 391.07 329 100% 329 1
wiki_history 511.48 324 100% 227 2
early_modern_science 453.34 263 100% 235 2
religious_translated 689.67 192 100% 175 2
cooking 0.00 — — — 0
legal_scotus 353.57 646 100% 367 2
eu_parliament_debates 76.49 1494 100% 1494 1
openstax_science 123.43 1146 100% 1146 1
openstax_society 564.24 284 100% 219 2
wpa_life_histories 491.40 267 100% 239 2

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.