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: 3481 (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 27.63 942 20% 3364 downrated 2
20th_books 42.44 795 20% 2313 downrated 2
wiki_math 0.00 — — — 0
wiki_geography 0.00 — — — 0
wiki_biology 197.19 159 20% 527 downrated 2
wiki_modern_life 5.93 4537 20% 10000 capped 1
wiki_arts 12.87 4086 20% 10000 capped 2
wiki_society 4.50 5423 20% 11000 capped 1
wiki_linguistics 0.00 — — — 0
wiki_physical_science 20.86 1998 20% 6560 downrated 2
wiki_history 0.00 — — — 0
early_modern_science 35.18 968 20% 3268 downrated 2
religious_translated 30.29 1203 20% 3390 downrated 2
cooking 24.64 1446 20% 3896 downrated 2
legal_scotus 0.00 — — — 0
eu_parliament_debates 0.00 — — — 0
openstax_science 31.81 1569 20% 4312 downrated 2
openstax_society 0.00 — — — 0
wpa_life_histories 28.82 889 20% 3409 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.