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: 458 (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
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 343.77 395 100% 294 2
20th_books 333.81 398 100% 306 2
wiki_math 356.86 596 100% 381 2
wiki_geography 42.07 3253 100% 3253 1
wiki_biology 49.07 2758 100% 2758 1
wiki_modern_life 157.80 1363 100% 935 2
wiki_arts 459.55 524 100% 265 2
wiki_society 647.63 325 100% 171 2
wiki_linguistics 207.98 1011 100% 622 2
wiki_physical_science 179.22 1198 100% 806 2
wiki_history 442.37 487 100% 271 2
early_modern_science 276.79 545 100% 400 2
religious_translated 128.91 1118 100% 776 2
cooking 57.47 1625 100% 1625 1
legal_scotus 82.98 2494 100% 1366 2
eu_parliament_debates 317.66 559 100% 384 2
openstax_science 188.68 1197 100% 736 2
openstax_society 594.42 414 100% 217 2
wpa_life_histories 192.71 675 100% 531 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.