Base Difficulty

Base difficulty: Level 26 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: 659 (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 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 244.87 458 100% 411 2
20th_books 321.19 357 100% 326 2
wiki_math 0.00 — — — 0
wiki_geography 712.90 232 100% 158 2
wiki_biology 28.86 4180 100% 4180 1
wiki_modern_life 93.61 2490 100% 1539 2
wiki_arts 107.70 1279 100% 1279 1
wiki_society 90.72 2813 100% 1536 2
wiki_linguistics 99.96 2069 100% 1205 2
wiki_physical_science 0.00 — — — 0
wiki_history 283.13 640 100% 454 2
early_modern_science 109.35 1492 100% 1025 2
religious_translated 88.07 1492 100% 1100 2
cooking 32.68 2318 100% 2318 1
legal_scotus 26.51 4510 100% 3011 2
eu_parliament_debates 43.35 3554 100% 1784 2
openstax_science 0.00 — — — 0
openstax_society 146.33 1773 100% 944 2
wpa_life_histories 1033.44 138 100% 122 3

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.