Base Difficulty

Base difficulty: Level 274 edit

Level distribution for noun (concept_idea): 19: 2 26: 1 27: 1 221: 28 270: 30 274: 30 275: 28 280: 25 300: 1 360: 1 380: 2 1000: 1 1030: 1 1060: 5 1070: 6 1110: 4 1120: 4 1399: 66

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: 2532 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cambridge_yle Movers (2 of 3) 750
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 3.65 6107 33% 18321 downrated 1
20th_books 9.25 2946 33% 8838 downrated 1
wiki_math 24.64 1541 33% 4623 downrated 1
wiki_geography 12.38 3669 33% 9000 capped 1
wiki_biology 0.00 — — — 0
wiki_modern_life 57.25 1241 33% 2552 downrated 2
wiki_arts 24.34 2937 33% 5492 downrated 2
wiki_society 80.00 1066 33% 1723 downrated 2
wiki_linguistics 24.72 2326 33% 4484 downrated 2
wiki_physical_science 0.00 — — — 0
wiki_history 50.83 1458 33% 2650 downrated 2
early_modern_science 0.00 — — — 0
religious_translated 13.74 2285 33% 6855 downrated 1
cooking 0.00 — — — 0
legal_scotus 45.67 1658 33% 2746 downrated 2
eu_parliament_debates 48.20 1426 33% 2328 downrated 2
openstax_science 43.36 1798 33% 3090 downrated 2
openstax_society 135.17 688 33% 1045 downrated 2
wpa_life_histories 3.14 6806 33% 20000 capped 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.