Base Difficulty

Base difficulty: Level 322 edit

Level distribution for adverb (indefinite_frequency): 322: 2

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: 448 (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 83.46 1121 100% 1121 1
20th_books 55.94 1629 100% 1629 1
wiki_math 560.86 236 100% 236 1
wiki_geography 275.97 444 100% 444 1
wiki_biology 676.51 147 100% 147 1
wiki_modern_life 623.35 150 100% 150 1
wiki_arts 383.92 275 100% 275 1
wiki_society 474.08 208 100% 208 1
wiki_linguistics 584.06 204 100% 204 1
wiki_physical_science 448.25 282 100% 282 1
wiki_history 172.44 748 100% 748 1
early_modern_science 323.72 335 100% 335 1
religious_translated 53.37 1844 100% 1844 1
cooking 156.59 792 100% 792 1
legal_scotus 335.45 359 100% 359 1
eu_parliament_debates 92.06 1277 100% 1277 1
openstax_science 217.64 642 100% 642 1
openstax_society 235.82 589 100% 589 1
wpa_life_histories 70.46 1345 100% 1345 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.