Base Difficulty

Base difficulty: Level 420 edit

Level distribution for adjective (indefinite_quantity): 420: 5 1020: 1 1120: 5 1399: 3

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: 1242 (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 11.87 5750 100% 5750 1
20th_books 8.62 6915 100% 6915 1
wiki_math 184.78 739 100% 739 1
wiki_geography 106.66 1285 100% 1285 1
wiki_biology 122.67 1142 100% 1142 1
wiki_modern_life 241.10 502 100% 502 1
wiki_arts 123.89 1095 100% 1095 1
wiki_society 129.63 1048 100% 1048 1
wiki_linguistics 234.32 572 100% 572 1
wiki_physical_science 169.93 852 100% 852 1
wiki_history 80.78 1683 100% 1683 1
early_modern_science 51.64 2144 100% 2144 1
religious_translated 0.00 — — — 0
cooking 66.48 1483 100% 1483 1
legal_scotus 225.46 566 100% 566 1
eu_parliament_debates 153.62 775 100% 775 1
openstax_science 212.79 660 100% 660 1
openstax_society 201.72 703 100% 703 1
wpa_life_histories 49.30 1889 100% 1889 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.