Base Difficulty

Base difficulty: Level 31 edit

Level distribution for noun (building_structure): 1: 10 8: 15 15: 14 16: 10 23: 10 27: 6 31: 2 32: 23

Per-Language Difficulty Overrides

No difficulty overrides set. The base difficulty level will be used for all languages.

Add Difficulty Override
-1 to exclude, 1-36 for level
Frequency and Tier Signals
Combined Frequency Rank: 1071 (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

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 56.15 959 33% 1528 downrated 2
20th_books 65.45 956 33% 1356 downrated 2
wiki_vital 221.83 196 33% 458 downrated 2
wiki_math 633.41 88 33% 179 downrated 2
wiki_geography 78.05 1021 33% 1669 downrated 2
wiki_biology 73.57 940 33% 1892 downrated 2
wiki_modern_life 193.98 211 33% 566 downrated 2
early_modern_science 62.27 906 33% 1725 downrated 2
religious_translated 76.66 708 33% 1297 downrated 2
cooking 0.00 — — — 0
legal_scotus 19.01 2245 33% 4642 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.