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
cefr A2 (2 of 6) 2100

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 28.46 3663 100% 2466 2
20th_books 38.46 2626 100% 1905 2
wiki_math 232.65 780 100% 541 2
wiki_geography 407.36 509 100% 296 2
wiki_biology 557.98 284 100% 209 2
wiki_modern_life 599.80 244 100% 179 2
wiki_arts 345.95 707 100% 360 2
wiki_society 476.14 479 100% 244 2
wiki_linguistics 304.28 728 100% 411 2
wiki_physical_science 835.04 227 100% 148 2
wiki_history 428.95 404 100% 251 2
early_modern_science 159.58 1008 100% 699 2
religious_translated 173.68 803 100% 585 2
cooking 0.00 — — — 0
legal_scotus 181.75 1132 100% 692 2
eu_parliament_debates 174.97 1127 100% 668 2
openstax_science 564.14 312 100% 228 2
openstax_society 400.55 610 100% 353 2
wpa_life_histories 52.13 2005 100% 1531 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.