Base Difficulty

Base difficulty: Level 270 edit

Level distribution for noun (financial_ledger_entry): 20: 1 224: 1 270: 1 274: 5 275: 1 276: 2 299: 1 300: 6 380: 1 440: 1 1399: 18

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: 687 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
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 208.74 536 100% 462 2
20th_books 109.17 1058 100% 850 2
wiki_math 65.83 1661 100% 1661 1
wiki_geography 167.46 1562 100% 845 2
wiki_biology 125.20 1742 100% 1094 2
wiki_modern_life 132.46 1665 100% 1103 2
wiki_arts 164.19 1260 100% 839 2
wiki_society 346.10 559 100% 371 2
wiki_linguistics 134.36 1476 100% 927 2
wiki_physical_science 180.48 1089 100% 789 2
wiki_history 295.37 711 100% 438 2
early_modern_science 372.09 322 100% 288 2
religious_translated 221.44 485 100% 485 1
cooking 40.57 2003 100% 2003 1
legal_scotus 252.78 608 100% 494 2
eu_parliament_debates 445.36 314 100% 270 2
openstax_science 118.03 1688 100% 1113 2
openstax_society 245.95 861 100% 574 2
wpa_life_histories 104.64 1081 100% 917 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.