Base Difficulty

Base difficulty: Level 10 edit

Level distribution for noun (building_structure): 1: 9 10: 6 20: 7 24: 9 26: 7 110: 4 114: 24 115: 12 120: 1 278: 4 380: 1 405: 3 1000: 2 1010: 1 1040: 8 1050: 1 1078: 4 1120: 1 1209: 1 1218: 1 1221: 1 1225: 1 1399: 12

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: 709 (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 41.86 1819 50% 1993 downrated 2
20th_books 84.44 1059 50% 1083 downrated 2
wiki_math 30.52 1762 50% 3524 downrated 1
wiki_geography 572.54 275 100% 197 2
wiki_biology 61.42 2283 50% 2097 2
wiki_modern_life 367.47 337 50% 320 2
wiki_arts 539.05 250 50% 196 2
wiki_society 182.97 665 50% 732 downrated 2
wiki_linguistics 21.89 2650 50% 5300 downrated 1
wiki_physical_science 110.69 1181 50% 1272 downrated 2
wiki_history 200.51 612 50% 638 downrated 2
early_modern_science 64.90 1644 50% 1657 downrated 2
religious_translated 24.27 1991 50% 3982 downrated 1
cooking 16.33 2285 50% 4570 downrated 1
legal_scotus 40.26 2516 50% 2500 2
eu_parliament_debates 98.16 1090 50% 1118 downrated 2
openstax_science 81.82 1106 50% 1569 downrated 2
openstax_society 149.71 788 50% 933 downrated 2
wpa_life_histories 213.67 401 50% 491 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.