Base Difficulty

Base difficulty: Level 28 edit

Level distribution for noun (plant_part): 28: 3 170: 13 278: 1 1010: 5 1078: 3 1090: 5 1210: 2 1399: 3

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: 911 (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 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 81.88 897 50% 1109 downrated 2
20th_books 74.98 1030 50% 1221 downrated 2
wiki_math 20.15 2354 50% 4708 downrated 1
wiki_geography 14.49 4486 50% 8972 downrated 1
wiki_biology 885.13 99 50% 116 downrated 2
wiki_modern_life 78.77 1549 50% 1813 downrated 2
wiki_arts 75.44 1417 50% 1787 downrated 2
wiki_society 15.91 4197 50% 8394 downrated 1
wiki_linguistics 23.49 2510 50% 5020 downrated 1
wiki_physical_science 94.57 1396 50% 1471 downrated 2
wiki_history 0.00 — — — 0
early_modern_science 159.58 502 50% 682 downrated 2
religious_translated 63.33 1444 50% 1507 downrated 2
cooking 457.94 217 50% 331 downrated 2
legal_scotus 29.74 2042 50% 4084 downrated 1
eu_parliament_debates 12.74 3228 50% 6456 downrated 1
openstax_science 151.18 898 50% 921 downrated 2
openstax_society 16.52 3628 50% 7256 downrated 1
wpa_life_histories 46.90 1447 50% 1799 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.