Base Difficulty

Base difficulty: Level 420 edit

Level distribution for adjective (mathematical): 360: 1 420: 10 1000: 1 1050: 1 1080: 35 1110: 3 1120: 9 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: 4415 (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 21.80 1835 44% 4129 downrated 1
20th_books 10.47 3407 44% 7666 downrated 1
wiki_math 34.90 1477 44% 3323 downrated 1
wiki_geography 0.00 — — — 0
wiki_biology 0.00 — — — 0
wiki_modern_life 0.00 — — — 0
wiki_arts 0.00 — — — 0
wiki_society 13.28 4393 44% 9884 downrated 1
wiki_linguistics 249.12 215 44% 484 downrated 1
wiki_physical_science 0.00 — — — 0
wiki_history 0.00 — — — 0
early_modern_science 41.68 1254 44% 2822 downrated 1
religious_translated 7.83 4435 44% 9979 downrated 1
cooking 0.00 — — — 0
legal_scotus 3.42 7943 44% 17872 downrated 1
eu_parliament_debates 0.00 — — — 0
openstax_science 13.48 3800 44% 8550 downrated 1
openstax_society 0.00 — — — 0
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.