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 Movers (2 of 3) 750
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 27.74 3647 80% 2743 2
20th_books 29.28 3861 80% 2556 2
wiki_math 0.00 — — — 0
wiki_geography 291.73 639 80% 444 2
wiki_biology 1909.74 75 80% 49 3
wiki_modern_life 463.22 379 80% 244 2
wiki_arts 47.31 4243 80% 2767 2
wiki_society 88.00 2401 80% 1590 2
wiki_linguistics 17.63 4273 80% 5341 downrated 1
wiki_physical_science 889.58 151 80% 123 2
wiki_history 68.80 3018 80% 1962 2
early_modern_science 451.67 249 80% 239 2
religious_translated 88.42 1672 80% 1126 2
cooking 116.29 1043 80% 904 2
legal_scotus 65.57 2547 80% 1729 2
eu_parliament_debates 89.84 1810 80% 1182 2
openstax_science 822.55 171 80% 129 2
openstax_society 165.35 1229 80% 847 2
wpa_life_histories 107.02 1035 80% 914 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.