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: 224 (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 337.17 361 100% 296 3
20th_books 377.14 321 100% 281 2
wiki_math 107.40 1353 100% 995 2
wiki_geography 203.78 998 100% 673 2
wiki_biology 1570.95 70 100% 60 2
wiki_modern_life 592.55 187 100% 168 2
wiki_arts 393.47 323 100% 282 2
wiki_society 598.99 209 100% 176 2
wiki_linguistics 137.58 1121 100% 893 2
wiki_physical_science 1124.27 121 100% 92 3
wiki_history 268.64 556 100% 459 2
early_modern_science 1349.78 136 100% 76 2
religious_translated 936.66 162 100% 129 2
cooking 152.12 809 100% 809 1
legal_scotus 137.42 1153 100% 893 2
eu_parliament_debates 218.54 1008 100% 546 2
openstax_science 1678.61 69 100% 62 3
openstax_society 334.83 524 100% 402 2
wpa_life_histories 228.33 560 100% 454 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.