Base Difficulty

Base difficulty: Level 105 edit

Level distribution for adverb (style): 6: 1 19: 4 20: 4 105: 46 1080: 1 1202: 1 1399: 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: 498 (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 112.07 844 100% 844 1
20th_books 100.11 988 100% 988 1
wiki_math 185.42 735 100% 735 1
wiki_geography 361.94 321 100% 321 1
wiki_biology 488.49 216 100% 216 1
wiki_modern_life 421.55 232 100% 232 1
wiki_arts 390.46 271 100% 271 1
wiki_society 406.73 261 100% 261 1
wiki_linguistics 540.82 224 100% 224 1
wiki_physical_science 304.83 440 100% 440 1
wiki_history 299.00 379 100% 379 1
early_modern_science 294.12 368 100% 368 1
religious_translated 89.53 1145 100% 1145 1
cooking 172.36 742 100% 742 1
legal_scotus 78.70 1634 100% 1634 1
eu_parliament_debates 389.78 315 100% 315 1
openstax_science 205.18 685 100% 685 1
openstax_society 399.37 297 100% 297 1
wpa_life_histories 103.63 958 100% 958 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.