Base Difficulty

Base difficulty: Level 22 edit

Level distribution for adjective (sequence): 22: 7 225: 1 1120: 12 1399: 4

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: 644 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
cambridge_yle Flyers (3 of 3) 1200

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 371.54 240 80% 300 downrated 1
20th_books 366.49 253 80% 316 downrated 1
wiki_math 143.21 761 80% 951 downrated 1
wiki_geography 154.08 660 80% 825 downrated 1
wiki_biology 96.98 1159 80% 1449 downrated 1
wiki_modern_life 174.67 566 80% 707 downrated 1
wiki_arts 186.86 516 80% 645 downrated 1
wiki_society 98.05 1126 80% 1407 downrated 1
wiki_linguistics 111.35 941 80% 1176 downrated 1
wiki_physical_science 115.46 1019 80% 1274 downrated 1
wiki_history 297.38 282 80% 352 downrated 1
early_modern_science 273.98 314 80% 392 downrated 1
religious_translated 163.99 533 80% 666 downrated 1
cooking 179.39 602 80% 752 downrated 1
legal_scotus 89.86 1160 80% 1450 downrated 1
eu_parliament_debates 295.27 329 80% 411 downrated 1
openstax_science 269.64 374 80% 468 downrated 1
openstax_society 202.38 534 80% 668 downrated 1
wpa_life_histories 516.45 186 80% 232 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.