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: 2449 (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 70.80 1302 100% 1302 1
20th_books 75.08 1267 100% 1267 1
wiki_math 0.00 — — — 0
wiki_geography 32.40 4108 100% 4108 1
wiki_biology 27.93 4238 100% 4238 1
wiki_modern_life 0.00 — — — 0
wiki_arts 34.69 3816 100% 3816 1
wiki_society 35.17 3872 100% 3872 1
wiki_linguistics 26.16 3767 100% 3767 1
wiki_physical_science 0.00 — — — 0
wiki_history 33.29 3938 100% 3938 1
early_modern_science 23.53 4013 100% 4013 1
religious_translated 120.67 870 100% 870 1
cooking 208.41 630 100% 630 1
legal_scotus 105.21 1248 100% 1248 1
eu_parliament_debates 51.18 2032 100% 2032 1
openstax_science 0.00 — — — 0
openstax_society 37.58 3226 100% 3226 1
wpa_life_histories 28.83 2724 100% 2724 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.