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: 1526 (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 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 75.15 1379 100% 1159 2
20th_books 33.44 3261 100% 2225 2
wiki_math 0.00 — — — 0
wiki_geography 81.90 1735 100% 1735 1
wiki_biology 78.07 1767 100% 1767 1
wiki_modern_life 52.37 2802 100% 2802 1
wiki_arts 0.00 — — — 0
wiki_society 0.00 — — — 0
wiki_linguistics 0.00 — — — 0
wiki_physical_science 187.90 772 100% 772 1
wiki_history 0.00 — — — 0
early_modern_science 143.45 784 100% 784 1
religious_translated 29.20 3015 100% 3015 1
cooking 0.00 — — — 0
legal_scotus 12.54 6044 100% 6044 1
eu_parliament_debates 0.00 — — — 0
openstax_science 26.58 4148 100% 4148 1
openstax_society 0.00 — — — 0
wpa_life_histories 60.40 1555 100% 1555 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.