Base Difficulty

Base difficulty: Level 1399 edit

Level distribution for noun (spatial_division): 249: 11 254: 2 350: 1 460: 1 1078: 1 1200: 4 1201: 1 1202: 3 1203: 2 1204: 9 1206: 3 1207: 4 1208: 1 1209: 5 1210: 4 1211: 4 1212: 1 1213: 1 1217: 2 1219: 1 1220: 1 1226: 5 1399: 9

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: 4654 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cefr B2 (4 of 6) 6900

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 2.01 9549 36% 20000 capped 1
20th_books 2.22 8721 36% 20000 capped 1
wiki_math 10.05 2952 36% 8000 capped 1
wiki_geography 27.59 1857 36% 5107 downrated 1
wiki_biology 21.75 2286 36% 6286 downrated 1
wiki_modern_life 51.85 985 36% 2709 downrated 1
wiki_arts 22.38 2247 36% 6179 downrated 1
wiki_society 36.45 1404 36% 3861 downrated 1
wiki_linguistics 26.40 1755 36% 4826 downrated 1
wiki_physical_science 153.01 351 36% 855 downrated 2
wiki_history 16.66 2970 36% 8168 downrated 1
early_modern_science 0.00 — — — 0
religious_translated 0.00 — — — 0
cooking 49.16 898 36% 2470 downrated 1
legal_scotus 25.68 1782 36% 4900 downrated 1
eu_parliament_debates 14.13 2456 36% 6754 downrated 1
openstax_science 73.40 812 36% 1876 downrated 2
openstax_society 31.24 1605 36% 4414 downrated 1
wpa_life_histories 5.82 4273 36% 11751 downrated 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.