Base Difficulty

Base difficulty: Level 475 edit

Level distribution for verb (rule_defined_action): 415: 1 475: 5 485: 2 1200: 1 1202: 3 1203: 1 1204: 2 1205: 3 1206: 3 1208: 3 1211: 1 1214: 5 1220: 4 1224: 1 1226: 3 1399: 7

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: 2492 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
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 11.32 3837 36% 6522 downrated 2
20th_books 8.34 4784 36% 7882 downrated 2
wiki_math 17.22 2081 36% 5723 downrated 1
wiki_geography 46.97 1050 36% 2888 downrated 1
wiki_biology 26.24 1887 36% 5189 downrated 1
wiki_modern_life 54.41 928 36% 2552 downrated 1
wiki_arts 51.78 936 36% 2574 downrated 1
wiki_society 108.30 531 36% 1147 downrated 3
wiki_linguistics 112.76 491 36% 1151 downrated 2
wiki_physical_science 34.68 1535 36% 4221 downrated 1
wiki_history 62.49 752 36% 2068 downrated 1
early_modern_science 28.72 1964 36% 3729 downrated 2
religious_translated 7.74 3860 36% 10400 capped 1
cooking 0.00 — — — 0
legal_scotus 139.31 633 36% 898 downrated 4
eu_parliament_debates 267.53 265 36% 430 downrated 5
openstax_science 0.00 — — — 0
openstax_society 70.35 1243 36% 1907 downrated 3
wpa_life_histories 6.52 4199 36% 11547 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.