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: 168 (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 1240.70 109 100% 99 2
20th_books 1347.22 100 100% 91 2
wiki_math 958.55 193 100% 139 2
wiki_geography 265.08 556 100% 479 2
wiki_biology 378.49 441 100% 337 2
wiki_modern_life 599.63 213 100% 173 2
wiki_arts 633.98 201 100% 167 2
wiki_society 788.40 168 100% 125 2
wiki_linguistics 707.78 254 100% 176 2
wiki_physical_science 469.64 394 100% 290 2
wiki_history 492.72 250 100% 217 2
early_modern_science 900.23 126 100% 114 2
religious_translated 1167.39 136 100% 108 2
cooking 784.27 240 100% 199 2
legal_scotus 496.65 296 100% 246 2
eu_parliament_debates 1198.72 106 100% 95 2
openstax_science 746.42 202 100% 153 2
openstax_society 1495.14 102 100% 71 2
wpa_life_histories 1305.02 118 100% 105 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.