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: 1487 (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 Flyers (3 of 3) 1200

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 47.02 1304 50% 1828 downrated 2
20th_books 51.82 1102 50% 1646 downrated 2
wiki_vital 71.42 1626 50% 1944 downrated 2
wiki_math 650.38 144 50% 200 downrated 2
wiki_geography 19.46 3074 50% 6211 downrated 1
wiki_biology 67.60 1607 50% 2045 downrated 2
wiki_modern_life 73.06 1643 50% 1997 downrated 2
early_modern_science 118.53 778 50% 946 downrated 2
religious_translated 45.78 1875 50% 2050 downrated 2
cooking 159.19 618 50% 798 downrated 2
legal_scotus 2.29 9822 50% 16945 downrated 1

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.