Base Difficulty

Base difficulty: Level 265 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: 753 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
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 155.62 144 14% 726 downrated 2
20th_books 128.73 173 14% 892 downrated 2
wiki_math 93.71 198 14% 1386 downrated 1
wiki_geography 125.62 108 14% 756 downrated 1
wiki_biology 150.40 90 14% 630 downrated 1
wiki_modern_life 160.07 75 14% 525 downrated 1
wiki_arts 186.42 87 14% 505 downrated 2
wiki_society 373.68 61 14% 260 downrated 2
wiki_linguistics 182.03 114 14% 615 downrated 2
wiki_physical_science 120.48 115 14% 805 downrated 1
wiki_history 158.36 99 14% 590 downrated 2
early_modern_science 333.36 70 14% 350 downrated 2
religious_translated 361.36 105 14% 325 downrated 2
cooking 71.31 310 14% 2170 downrated 1
legal_scotus 48.28 357 14% 2499 downrated 1
eu_parliament_debates 205.32 99 14% 532 downrated 2
openstax_science 70.24 218 14% 1526 downrated 1
openstax_society 178.46 135 14% 646 downrated 2
wpa_life_histories 72.60 265 14% 1533 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.