Base Difficulty

Base difficulty: Level 221 edit

Level distribution for noun (concept_idea): 19: 2 20: 3 26: 1 27: 1 221: 29 270: 31 274: 37 275: 31 280: 29 380: 2 1000: 1 1030: 1 1060: 5 1070: 6 1110: 7 1120: 1

Per-Language Difficulty Overrides

No difficulty overrides set. The base difficulty level will be used for all languages.

Add Difficulty Override
-1 to exclude, 1-1299 for level
Frequency and Tier Signals
Combined Frequency Rank: — (run python -m storage.admin --calc-ranks to populate)
Tier Signals
Source Tier Rank used
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 336.39 316 100% 316 1
20th_books 383.33 291 100% 291 1
wiki_math 81.43 1399 100% 1399 1
wiki_geography 36.69 3231 100% 3231 1
wiki_biology 135.06 1021 100% 1021 1
wiki_modern_life 93.58 1547 100% 1547 1
wiki_arts 132.67 979 100% 979 1
wiki_society 202.73 586 100% 586 1
wiki_linguistics 100.49 1205 100% 1205 1
wiki_physical_science 654.77 159 100% 159 1
wiki_history 118.99 1043 100% 1043 1
early_modern_science 524.77 200 100% 200 1
religious_translated 276.46 391 100% 391 1
cooking 116.70 1012 100% 1012 1
legal_scotus 651.85 153 100% 153 1
eu_parliament_debates 556.25 228 100% 228 1
openstax_science 424.35 274 100% 274 1
openstax_society 140.11 1012 100% 1012 1
wpa_life_histories 182.00 591 100% 591 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.