Base Difficulty

Base difficulty: Level 250 edit

Level distribution for adverb (location): 18: 4 23: 22 250: 13 1070: 1 1120: 5 1205: 1 1221: 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: 1984 (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 50.63 1789 100% 1789 1
20th_books 57.84 1576 100% 1576 1
wiki_math 34.55 2564 100% 2564 1
wiki_geography 68.38 2045 100% 2045 1
wiki_biology 99.20 1415 100% 1415 1
wiki_modern_life 70.54 2107 100% 2107 1
wiki_arts 58.26 2371 100% 2371 1
wiki_society 61.37 2272 100% 2272 1
wiki_linguistics 100.37 1283 100% 1283 1
wiki_physical_science 92.20 1571 100% 1571 1
wiki_history 63.46 2167 100% 2167 1
early_modern_science 72.11 1598 100% 1598 1
religious_translated 75.03 1376 100% 1376 1
cooking 113.78 1037 100% 1037 1
legal_scotus 49.16 2358 100% 2358 1
eu_parliament_debates 72.20 1557 100% 1557 1
openstax_science 96.36 1424 100% 1424 1
openstax_society 41.71 2988 100% 2988 1
wpa_life_histories 43.47 1986 100% 1986 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.