Base Difficulty

Base difficulty: Level 1050 edit

Level distribution for noun (family_relation): 5: 11 18: 8 102: 7 302: 10 315: 7 1002: 12 1050: 1 1120: 3 1399: 1

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: 1345 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
cefr B1 (3 of 6) 4200

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 23.81 4939 80% 2974 2
20th_books 21.88 4898 100% 3062 2
wiki_math 128.42 852 80% 1065 downrated 1
wiki_geography 70.07 1629 80% 2036 downrated 1
wiki_biology 337.21 627 100% 394 2
wiki_modern_life 126.41 1166 80% 1127 2
wiki_arts 49.95 2227 80% 2784 downrated 1
wiki_society 119.30 1384 80% 1173 2
wiki_linguistics 216.04 594 80% 598 downrated 2
wiki_physical_science 339.36 304 80% 380 downrated 1
wiki_history 100.99 2068 80% 1354 2
early_modern_science 81.10 1148 80% 1435 downrated 1
religious_translated 57.18 2359 100% 1576 2
cooking 0.00 — — — 0
legal_scotus 39.83 2853 80% 2441 2
eu_parliament_debates 14.62 3958 80% 4947 downrated 1
openstax_science 251.02 407 80% 509 downrated 1
openstax_society 134.26 1258 80% 1014 2
wpa_life_histories 68.39 1661 100% 1332 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.