Base Difficulty

Base difficulty: Level 109 edit

Level distribution for verb (change): 22: 4 28: 1 109: 1 140: 1 162: 2 194: 1 254: 1 255: 1 309: 2 311: 1 321: 16 410: 2 415: 2 475: 5 1040: 1 1090: 1 1399: 38

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: 1154 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cefr A2 (2 of 6) 2100

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 24.26 4233 100% 2875 2
20th_books 26.29 3833 100% 2652 2
wiki_math 245.99 1095 100% 486 3
wiki_geography 135.25 1009 100% 1009 1
wiki_biology 116.18 1636 100% 1166 2
wiki_modern_life 324.61 587 100% 406 3
wiki_arts 187.98 868 100% 703 2
wiki_society 160.05 1427 100% 861 3
wiki_linguistics 421.34 449 100% 306 3
wiki_physical_science 160.39 1144 100% 875 2
wiki_history 176.41 980 100% 758 2
early_modern_science 22.40 4194 100% 4194 1
religious_translated 0.00 — — — 0
cooking 64.23 1521 100% 1521 1
legal_scotus 39.67 4981 100% 1982 3
eu_parliament_debates 69.59 3077 100% 1157 3
openstax_science 110.97 1844 100% 1181 2
openstax_society 98.38 2344 100% 1328 2
wpa_life_histories 20.17 5119 100% 3310 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.