Base Difficulty

Base difficulty: Level 170 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: 1169 (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 23.04 4394 97% 3010 2
20th_books 31.45 4354 97% 2311 2
wiki_math 0.00 — — — 0
wiki_geography 0.00 — — — 0
wiki_biology 1031.62 154 97% 100 2
wiki_modern_life 124.23 1927 97% 1187 2
wiki_arts 0.00 — — — 0
wiki_society 0.00 — — — 0
wiki_linguistics 0.00 — — — 0
wiki_physical_science 117.22 2088 97% 1206 2
wiki_history 0.00 — — — 0
early_modern_science 186.16 913 97% 616 2
religious_translated 147.52 718 97% 740 downrated 1
cooking 382.90 587 97% 344 2
legal_scotus 0.00 — — — 0
eu_parliament_debates 0.00 — — — 0
openstax_science 164.22 1579 97% 841 2
openstax_society 27.29 4109 97% 4232 downrated 1
wpa_life_histories 72.01 1580 97% 1261 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.