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: 758 (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 24.39 3363 100% 3363 1
20th_books 27.55 2963 100% 2963 1
wiki_math 0.00 — — — 0
wiki_geography 379.95 298 100% 298 1
wiki_biology 377.40 356 100% 319 2
wiki_modern_life 519.77 232 100% 200 2
wiki_arts 103.74 1326 100% 1326 1
wiki_society 110.53 1270 100% 1270 1
wiki_linguistics 0.00 — — — 0
wiki_physical_science 257.79 635 100% 537 2
wiki_history 92.37 1444 100% 1444 1
early_modern_science 184.91 717 100% 594 2
religious_translated 66.78 1534 100% 1534 1
cooking 730.19 226 100% 226 1
legal_scotus 26.51 3776 100% 3776 1
eu_parliament_debates 126.53 943 100% 943 1
openstax_science 86.44 1596 100% 1596 1
openstax_society 146.74 964 100% 964 1
wpa_life_histories 135.57 768 100% 768 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.