Base Difficulty

Base difficulty: Level 11 edit

Level distribution for conjunction (conjunction_other): 6: 4 9: 4 10: 1 11: 2 304: 4 1399: 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, 1-1399 for level
Frequency and Tier Signals
Combined Frequency Rank: 418 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cefr B1 (3 of 6) 4200

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 127.51 402 50% 804 downrated 1
20th_books 226.75 257 50% 514 downrated 1
wiki_math 100.47 679 50% 1358 downrated 1
wiki_geography 388.33 127 50% 254 downrated 1
wiki_biology 238.67 225 50% 450 downrated 1
wiki_modern_life 305.83 152 50% 304 downrated 1
wiki_arts 290.23 170 50% 340 downrated 1
wiki_society 222.30 231 50% 462 downrated 1
wiki_linguistics 216.04 281 50% 562 downrated 1
wiki_physical_science 185.62 352 50% 704 downrated 1
wiki_history 426.32 105 50% 210 downrated 1
early_modern_science 165.35 326 50% 652 downrated 1
religious_translated 149.82 365 50% 730 downrated 1
cooking 2098.72 29 50% 58 downrated 1
legal_scotus 130.44 486 50% 972 downrated 1
eu_parliament_debates 97.85 617 50% 1234 downrated 1
openstax_science 137.36 493 50% 986 downrated 1
openstax_society 163.07 384 50% 768 downrated 1
wpa_life_histories 371.52 166 50% 332 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.