Base Difficulty

Base difficulty: Level 300 edit

Level distribution for noun (mental_construct): 265: 27 300: 1 390: 2 460: 1 1060: 6 1070: 1 1120: 1 1399: 30

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: 2984 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cefr A2 (2 of 6) 2100

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 48.41 487 19% 2046 downrated 2
20th_books 46.56 498 19% 2171 downrated 2
wiki_math 69.96 390 19% 2028 downrated 1
wiki_geography 7.62 3448 19% 9000 capped 1
wiki_biology 43.44 727 19% 3096 downrated 2
wiki_modern_life 21.63 1308 19% 6802 downrated 1
wiki_arts 45.24 512 19% 2662 downrated 1
wiki_society 83.53 267 19% 1293 downrated 2
wiki_linguistics 45.37 632 19% 2816 downrated 2
wiki_physical_science 23.60 1195 19% 6214 downrated 1
wiki_history 25.55 1001 19% 5205 downrated 1
early_modern_science 31.18 1006 19% 3657 downrated 2
religious_translated 122.84 303 19% 900 downrated 2
cooking 0.00 — — — 0
legal_scotus 40.98 593 19% 3084 downrated 1
eu_parliament_debates 31.71 715 19% 3718 downrated 1
openstax_science 36.68 957 19% 3764 downrated 2
openstax_society 65.42 397 19% 1903 downrated 2
wpa_life_histories 14.26 1310 19% 6812 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.