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: 2809 (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 0.00 — — — 0
20th_books 0.00 — — — 0
wiki_math 27.64 2980 100% 2980 1
wiki_geography 37.28 3646 100% 3646 1
wiki_biology 27.58 4285 100% 4285 1
wiki_modern_life 97.48 1510 100% 1510 1
wiki_arts 108.66 1264 100% 1264 1
wiki_society 173.38 749 100% 749 1
wiki_linguistics 120.12 1076 100% 1076 1
wiki_physical_science 0.00 — — — 0
wiki_history 45.25 3014 100% 3014 1
early_modern_science 0.00 — — — 0
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 7.28 8190 100% 8190 1
eu_parliament_debates 12.21 5019 100% 5019 1
openstax_science 64.38 2068 100% 2068 1
openstax_society 92.93 1493 100% 1493 1
wpa_life_histories 0.00 — — — 0

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.