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: 2613 (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 Starters (1 of 3) 325
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 46.29 1135 49% 1929 downrated 2
20th_books 41.93 1435 49% 2130 downrated 2
wiki_math 8.53 3909 49% 7935 downrated 1
wiki_geography 18.54 3614 49% 7336 downrated 1
wiki_biology 0.00 — — — 0
wiki_modern_life 146.52 530 49% 868 downrated 2
wiki_arts 26.36 2581 49% 5239 downrated 1
wiki_society 30.23 2260 49% 4588 downrated 1
wiki_linguistics 0.00 — — — 0
wiki_physical_science 0.00 — — — 0
wiki_history 28.62 2351 49% 4773 downrated 1
early_modern_science 23.19 2346 49% 4762 downrated 1
religious_translated 0.00 — — — 0
cooking 137.11 511 49% 1037 downrated 1
legal_scotus 56.69 1470 49% 2001 downrated 3
eu_parliament_debates 37.94 1488 49% 3021 downrated 1
openstax_science 0.00 — — — 0
openstax_society 30.95 2171 49% 4407 downrated 1
wpa_life_histories 76.39 824 49% 1294 downrated 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.