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: 802 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
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 40.09 3392 100% 1964 2
20th_books 33.86 4217 100% 2175 2
wiki_math 1037.09 226 100% 129 2
wiki_geography 65.24 3816 100% 2049 2
wiki_biology 624.55 369 100% 192 2
wiki_modern_life 108.20 2311 100% 1348 2
wiki_arts 109.02 2006 100% 1261 2
wiki_society 125.92 2141 100% 1106 2
wiki_linguistics 465.41 433 100% 280 2
wiki_physical_science 143.58 1861 100% 1001 2
wiki_history 31.66 4110 100% 4110 1
early_modern_science 102.14 2152 100% 1087 2
religious_translated 169.18 885 100% 607 2
cooking 145.36 1289 100% 710 2
legal_scotus 10.52 6714 100% 6714 1
eu_parliament_debates 37.08 3713 100% 1968 2
openstax_science 237.31 987 100% 595 2
openstax_society 57.87 3289 100% 2006 2
wpa_life_histories 52.66 2359 100% 1596 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.