Base Difficulty

Base difficulty: Level 180 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: 4620 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
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 2.90 7159 33% 20000 capped 1
20th_books 0.00 — — — 0
wiki_math 0.00 — — — 0
wiki_geography 13.15 3453 33% 9000 capped 1
wiki_biology 9.98 4051 33% 9000 capped 1
wiki_modern_life 141.91 327 33% 806 downrated 2
wiki_arts 0.00 — — — 0
wiki_society 11.85 3849 33% 11000 capped 1
wiki_linguistics 0.00 — — — 0
wiki_physical_science 82.67 709 33% 1705 downrated 2
wiki_history 0.00 — — — 0
early_modern_science 19.74 1931 33% 5793 downrated 1
religious_translated 5.74 4485 33% 10400 capped 1
cooking 37.94 1040 33% 3120 downrated 1
legal_scotus 15.25 2516 33% 7548 downrated 1
eu_parliament_debates 22.77 2180 33% 4037 downrated 2
openstax_science 46.82 1246 33% 2852 downrated 2
openstax_society 10.06 3861 33% 11000 capped 1
wpa_life_histories 6.87 3786 33% 11358 downrated 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.