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
basic_english Basic (1 of 2) 600
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 61.16 456 20% 1646 downrated 2
20th_books 46.11 582 20% 2150 downrated 2
wiki_math 204.03 129 20% 609 downrated 2
wiki_geography 48.35 559 20% 2439 downrated 2
wiki_biology 145.05 181 20% 752 downrated 2
wiki_modern_life 82.57 268 20% 1264 downrated 2
wiki_arts 83.89 287 20% 1259 downrated 2
wiki_society 128.34 166 20% 755 downrated 2
wiki_linguistics 164.60 153 20% 720 downrated 2
wiki_physical_science 82.39 356 20% 1592 downrated 2
wiki_history 98.24 239 20% 1020 downrated 2
early_modern_science 85.24 289 20% 1253 downrated 2
religious_translated 83.49 310 20% 1298 downrated 2
cooking 67.53 447 20% 2235 downrated 1
legal_scotus 172.84 131 20% 588 downrated 2
eu_parliament_debates 160.45 151 20% 730 downrated 2
openstax_science 77.57 354 20% 1615 downrated 2
openstax_society 98.24 251 20% 1168 downrated 2
wpa_life_histories 48.70 606 20% 2120 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.