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: 994 (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 190.73 748 97% 493 2
20th_books 179.08 731 97% 541 2
wiki_math 0.00 — — — 0
wiki_geography 110.97 1208 97% 1244 downrated 1
wiki_biology 100.49 2184 97% 1343 2
wiki_modern_life 262.13 655 97% 509 2
wiki_arts 290.12 568 97% 443 2
wiki_society 90.65 2013 97% 1498 2
wiki_linguistics 75.68 1649 97% 1698 downrated 1
wiki_physical_science 103.58 2076 97% 1329 2
wiki_history 111.54 1144 97% 1178 downrated 1
early_modern_science 215.91 808 97% 532 2
religious_translated 223.41 832 97% 471 2
cooking 229.68 942 97% 519 2
legal_scotus 0.00 — — — 0
eu_parliament_debates 0.00 — — — 0
openstax_science 0.00 — — — 0
openstax_society 70.17 1914 97% 1971 downrated 1
wpa_life_histories 183.69 682 97% 552 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.