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: 1303 (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 25.71 3212 100% 3212 1
20th_books 15.14 4728 100% 4728 1
wiki_math 49.66 2031 100% 2031 1
wiki_geography 316.35 380 100% 380 1
wiki_biology 239.21 526 100% 526 1
wiki_modern_life 130.75 1105 100% 1105 1
wiki_arts 196.57 655 100% 655 1
wiki_society 161.82 815 100% 815 1
wiki_linguistics 137.58 949 100% 949 1
wiki_physical_science 116.97 1260 100% 1260 1
wiki_history 197.57 634 100% 634 1
early_modern_science 188.32 574 100% 574 1
religious_translated 41.81 2255 100% 2255 1
cooking 0.00 — — — 0
legal_scotus 70.23 1791 100% 1791 1
eu_parliament_debates 67.14 1645 100% 1645 1
openstax_science 93.93 1469 100% 1469 1
openstax_society 108.72 1289 100% 1289 1
wpa_life_histories 36.52 2426 100% 2426 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.