Base Difficulty

Base difficulty: Level 27 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: 2494 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600

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 26.21 1451 20% 3270 downrated 4
20th_books 33.32 1343 20% 2686 downrated 4
wiki_math 18.71 1603 20% 5333 downrated 2
wiki_geography 12.46 2256 20% 9000 capped 1
wiki_biology 200.46 165 20% 556 downrated 4
wiki_modern_life 87.38 451 20% 1461 downrated 4
wiki_arts 82.13 610 20% 1609 downrated 4
wiki_society 18.00 2068 20% 7473 downrated 2
wiki_linguistics 11.18 3370 20% 9000 capped 2
wiki_physical_science 181.53 183 20% 651 downrated 4
wiki_history 27.63 1502 20% 4896 downrated 2
early_modern_science 111.17 411 20% 976 downrated 4
religious_translated 16.03 2351 20% 5413 downrated 3
cooking 68.29 497 20% 1967 downrated 2
legal_scotus 8.14 2781 20% 13905 downrated 1
eu_parliament_debates 0.00 — — — 0
openstax_science 85.53 451 20% 1559 downrated 2
openstax_society 24.80 1149 20% 5745 downrated 1
wpa_life_histories 17.16 1490 20% 5343 downrated 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.