Base Difficulty

Base difficulty: Level 370 edit

Level distribution for noun (quality_attribute): 370: 12 405: 3 450: 1 456: 1 1000: 2 1030: 1 1040: 2 1050: 1 1070: 4 1120: 2 1399: 50

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: 529 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
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 81.86 1492 80% 988 4
20th_books 89.10 1201 80% 975 3
wiki_math 455.02 387 80% 292 3
wiki_geography 72.70 2940 80% 1881 2
wiki_biology 249.24 781 80% 546 3
wiki_modern_life 254.75 950 80% 563 3
wiki_arts 200.27 1697 100% 690 3
wiki_society 417.26 760 80% 318 4
wiki_linguistics 942.10 320 80% 134 4
wiki_physical_science 421.24 487 80% 333 3
wiki_history 127.46 2471 80% 1069 3
early_modern_science 361.31 388 80% 305 3
religious_translated 132.98 1336 80% 777 2
cooking 38.76 1791 80% 2239 downrated 1
legal_scotus 417.56 672 100% 305 4
eu_parliament_debates 161.02 1156 80% 672 3
openstax_science 387.26 600 80% 354 3
openstax_society 364.34 486 80% 369 3
wpa_life_histories 62.83 1407 80% 1439 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.