Base Difficulty

Base difficulty: Level 460 edit

Level distribution for noun (collection_things): 278: 1 405: 1 450: 1 460: 9 1000: 5 1010: 1 1030: 1 1050: 3 1060: 1 1078: 2 1080: 1 1120: 1 1205: 3 1211: 1 1214: 1 1220: 3 1223: 2 1399: 33

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: 716 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cefr B1 (3 of 6) 4200

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 20.36 3989 80% 3496 2
20th_books 9.59 5559 80% 6949 downrated 1
wiki_math 316.90 489 80% 424 2
wiki_geography 152.64 863 80% 879 downrated 2
wiki_biology 709.49 207 80% 153 2
wiki_modern_life 344.88 310 80% 328 downrated 2
wiki_arts 221.75 476 80% 537 downrated 2
wiki_society 145.02 717 80% 896 downrated 1
wiki_linguistics 983.26 159 80% 124 2
wiki_physical_science 181.13 622 80% 778 downrated 1
wiki_history 72.85 1472 80% 1840 downrated 1
early_modern_science 280.06 594 80% 391 2
religious_translated 13.63 4555 80% 5694 downrated 1
cooking 206.44 729 80% 588 2
legal_scotus 66.71 1663 80% 1766 downrated 2
eu_parliament_debates 20.82 3206 80% 4007 downrated 1
openstax_science 199.49 554 80% 692 downrated 1
openstax_society 182.21 613 80% 766 downrated 1
wpa_life_histories 20.44 3209 80% 4011 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.