Base Difficulty

Base difficulty: Level 179 edit

Level distribution for noun (material_substance): 19: 1 135: 1 179: 25 180: 26 184: 23 278: 2 314: 1 1000: 1 1020: 1 1030: 1 1040: 6 1050: 3 1078: 4 1090: 3 1100: 1 1399: 23

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: 835 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cefr B1 (3 of 6) 4200

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 8.83 7074 100% 7074 1
20th_books 0.00 — — — 0
wiki_math 36.96 2473 100% 2473 1
wiki_geography 45.36 3014 100% 3014 1
wiki_biology 232.00 878 100% 591 2
wiki_modern_life 364.76 409 100% 331 2
wiki_arts 0.00 — — — 0
wiki_society 86.48 2554 100% 1584 2
wiki_linguistics 0.00 — — — 0
wiki_physical_science 960.11 110 100% 103 2
wiki_history 56.73 2416 100% 2416 1
early_modern_science 260.08 416 100% 416 1
religious_translated 0.00 — — — 0
cooking 40.57 2009 100% 2009 1
legal_scotus 17.20 4998 100% 4998 1
eu_parliament_debates 66.61 2587 100% 1363 2
openstax_science 742.26 158 100% 141 2
openstax_society 26.04 4332 100% 4332 1
wpa_life_histories 0.00 — — — 0

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.