Base Difficulty

Base difficulty: Level 1 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: 335 (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 934.25 147 100% 127 2
20th_books 1016.47 145 100% 124 2
wiki_math 17.27 3942 100% 3942 1
wiki_geography 360.80 573 100% 360 2
wiki_biology 137.16 1361 100% 991 2
wiki_modern_life 241.77 920 100% 587 2
wiki_arts 366.57 515 100% 342 2
wiki_society 172.68 1225 100% 806 2
wiki_linguistics 234.91 656 100% 547 2
wiki_physical_science 0.00 — — — 0
wiki_history 330.66 449 100% 362 2
early_modern_science 408.35 381 100% 268 2
religious_translated 805.99 182 100% 152 2
cooking 159.97 777 100% 777 1
legal_scotus 108.04 1438 100% 1119 2
eu_parliament_debates 43.85 3006 100% 1789 2
openstax_science 52.75 3637 100% 2096 2
openstax_society 208.57 1067 100% 675 2
wpa_life_histories 1815.32 89 100% 75 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.