Base Difficulty

Base difficulty: Level 390 edit

Level distribution for adjective (purpose): 350: 1 360: 11 390: 1 400: 1 1000: 1 1010: 1 1020: 1 1040: 4 1060: 2 1070: 4 1078: 1 1120: 14 1399: 23

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: 6985 (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 2.25 3578 10% 20000 capped 1
20th_books 2.78 2950 10% 20000 capped 1
wiki_math 0.00 — — — 0
wiki_geography 40.69 268 10% 2680 downrated 1
wiki_biology 5.88 2323 10% 9000 capped 1
wiki_modern_life 13.25 1088 10% 10000 capped 1
wiki_arts 12.79 1059 10% 10000 capped 1
wiki_society 20.62 611 10% 6110 downrated 1
wiki_linguistics 85.72 132 10% 1320 downrated 1
wiki_physical_science 4.87 2767 10% 8000 capped 1
wiki_history 23.89 490 10% 4900 downrated 1
early_modern_science 0.00 — — — 0
religious_translated 2.26 3704 10% 10400 capped 1
cooking 0.00 — — — 0
legal_scotus 17.91 725 10% 7250 downrated 1
eu_parliament_debates 7.38 1531 10% 11000 capped 1
openstax_science 0.00 — — — 0
openstax_society 8.47 1628 10% 11000 capped 1
wpa_life_histories 1.59 4655 10% 20000 capped 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.