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: 437 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cambridge_yle Starters (1 of 3) 325
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 375.49 484 100% 267 2
20th_books 468.59 400 100% 223 2
wiki_math 86.37 1977 100% 1125 2
wiki_geography 240.48 928 100% 569 2
wiki_biology 1277.82 150 100% 78 2
wiki_modern_life 156.69 1748 100% 946 2
wiki_arts 99.17 2441 100% 1389 2
wiki_society 109.38 1938 100% 1275 2
wiki_linguistics 176.18 1049 100% 718 2
wiki_physical_science 205.89 1341 100% 712 2
wiki_history 43.54 3114 100% 3114 1
early_modern_science 611.00 281 100% 175 2
religious_translated 468.16 420 100% 233 2
cooking 31.54 2372 100% 2372 1
legal_scotus 0.00 — — — 0
eu_parliament_debates 12.00 5089 100% 5089 1
openstax_science 255.43 975 100% 554 2
openstax_society 69.38 3220 100% 1736 2
wpa_life_histories 444.05 470 100% 246 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.