Base Difficulty

Base difficulty: Level 28 edit

Level distribution for noun (plant): 28: 6 165: 17 330: 1 1010: 6 1020: 1 1040: 1 1078: 4 1090: 7 1399: 7

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: 2551 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cefr A1 (1 of 6) 800

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 102.90 440 33% 938 downrated 2
20th_books 135.67 410 33% 716 downrated 2
wiki_math 7.31 3461 33% 8000 capped 1
wiki_geography 26.35 1790 33% 5370 downrated 1
wiki_biology 23.93 1904 33% 5712 downrated 1
wiki_modern_life 0.00 — — — 0
wiki_arts 16.08 2859 33% 8577 downrated 1
wiki_society 12.67 3612 33% 10836 downrated 1
wiki_linguistics 6.81 4479 33% 9000 capped 1
wiki_physical_science 0.00 — — — 0
wiki_history 25.84 1755 33% 5265 downrated 1
early_modern_science 24.17 1597 33% 4791 downrated 1
religious_translated 42.39 834 33% 2502 downrated 1
cooking 89.77 927 33% 1118 downrated 2
legal_scotus 2.43 8210 33% 20000 capped 1
eu_parliament_debates 0.00 — — — 0
openstax_science 0.00 — — — 0
openstax_society 26.18 1749 33% 5247 downrated 1
wpa_life_histories 41.68 1391 33% 2080 downrated 2

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.