Base Difficulty

Base difficulty: Level 275 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 Extended (2 of 2) 1600
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 61.92 1105 50% 1456 downrated 2
20th_books 58.23 1293 50% 1520 downrated 2
wiki_math 0.00 — — — 0
wiki_geography 170.97 619 50% 730 downrated 2
wiki_biology 13.22 4386 50% 8772 downrated 1
wiki_modern_life 60.43 2221 50% 2419 downrated 2
wiki_arts 105.28 935 50% 1231 downrated 2
wiki_society 87.52 1379 50% 1557 downrated 2
wiki_linguistics 9.82 4304 50% 8608 downrated 1
wiki_physical_science 0.00 — — — 0
wiki_history 112.65 971 50% 1111 downrated 2
early_modern_science 31.84 1735 50% 3470 downrated 1
religious_translated 23.73 3194 50% 3465 downrated 2
cooking 45.89 1213 50% 2426 downrated 1
legal_scotus 291.78 255 50% 406 downrated 2
eu_parliament_debates 169.74 557 50% 723 downrated 2
openstax_science 42.31 2374 50% 2916 downrated 2
openstax_society 89.42 1215 50% 1567 downrated 2
wpa_life_histories 22.64 1937 50% 2027 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.