Base Difficulty

Base difficulty: Level 254 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: 240 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
cambridge_yle Movers (2 of 3) 750
cefr A1 (1 of 6) 800

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 427.34 221 80% 258 downrated 3
20th_books 497.91 205 80% 241 downrated 3
wiki_math 68.37 1399 80% 1749 downrated 1
wiki_geography 1109.22 93 80% 89 2
wiki_biology 470.20 221 80% 237 downrated 2
wiki_modern_life 680.66 136 80% 142 downrated 2
wiki_arts 706.99 122 80% 139 downrated 3
wiki_society 1044.41 70 80% 80 downrated 3
wiki_linguistics 339.65 354 80% 375 downrated 2
wiki_physical_science 348.40 429 80% 392 2
wiki_history 549.16 153 80% 178 downrated 2
early_modern_science 395.48 241 80% 267 downrated 3
religious_translated 1153.49 99 80% 108 downrated 3
cooking 40.57 1757 80% 2196 downrated 1
legal_scotus 33.52 2725 80% 3406 downrated 1
eu_parliament_debates 505.20 215 80% 245 downrated 2
openstax_science 243.71 582 80% 551 3
openstax_society 937.18 92 80% 109 downrated 2
wpa_life_histories 213.14 429 80% 505 downrated 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.