Base Difficulty

Base difficulty: Level 19 edit

Level distribution for noun (knowledge_domain): 19: 4 329: 28 1000: 13 1010: 4 1030: 2 1040: 2 1050: 2 1060: 14 1080: 4 1110: 24 1120: 3 1399: 21

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: 425 (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 Flyers (3 of 3) 1200
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 99.67 1004 100% 902 2
20th_books 69.41 1369 100% 1369 1
wiki_math 124.38 1068 100% 1068 1
wiki_geography 495.77 218 100% 218 1
wiki_biology 171.90 790 100% 790 1
wiki_modern_life 276.83 418 100% 418 1
wiki_arts 668.01 155 100% 150 2
wiki_society 539.32 173 100% 173 1
wiki_linguistics 290.43 448 100% 448 1
wiki_physical_science 189.90 761 100% 761 1
wiki_history 691.41 137 100% 137 1
early_modern_science 275.52 395 100% 395 1
religious_translated 65.17 1564 100% 1564 1
cooking 0.00 — — — 0
legal_scotus 391.70 312 100% 301 2
eu_parliament_debates 115.52 1036 100% 1036 1
openstax_science 151.60 942 100% 942 1
openstax_society 456.37 268 100% 253 2
wpa_life_histories 126.05 801 100% 801 1

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.