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: 2073 (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 45.10 1701 50% 1984 downrated 2
20th_books 49.96 1542 50% 1788 downrated 2
wiki_math 136.28 741 50% 958 downrated 2
wiki_geography 98.27 1163 50% 1413 downrated 2
wiki_biology 167.05 687 50% 814 downrated 2
wiki_modern_life 40.90 3204 50% 3490 downrated 2
wiki_arts 29.07 4054 50% 4474 downrated 2
wiki_society 83.12 1530 50% 1706 downrated 2
wiki_linguistics 225.72 459 50% 585 downrated 2
wiki_physical_science 68.53 1497 50% 2046 downrated 2
wiki_history 30.65 2221 50% 4442 downrated 1
early_modern_science 122.45 841 50% 937 downrated 2
religious_translated 43.07 1520 50% 2242 downrated 2
cooking 16.90 2244 50% 4488 downrated 1
legal_scotus 30.96 3343 50% 3376 downrated 2
eu_parliament_debates 0.00 — — — 0
openstax_science 86.24 1489 50% 1597 downrated 2
openstax_society 80.61 1504 50% 1706 downrated 2
wpa_life_histories 22.74 2964 50% 3504 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.