Base Difficulty

Base difficulty: Level 321 edit

Level distribution for verb (change): 22: 4 28: 1 109: 1 140: 1 162: 2 194: 1 254: 1 255: 1 309: 2 311: 1 321: 16 410: 2 415: 2 475: 5 1040: 1 1090: 1 1399: 38

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: 1371 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cambridge_yle Flyers (3 of 3) 1200
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 211.37 213 20% 513 downrated 4
20th_books 219.77 181 20% 520 downrated 4
wiki_math 52.00 895 20% 2320 downrated 3
wiki_geography 37.30 1183 20% 3735 downrated 2
wiki_biology 57.22 783 20% 2331 downrated 4
wiki_modern_life 87.00 567 20% 1556 downrated 4
wiki_arts 71.91 922 20% 1883 downrated 4
wiki_society 50.44 819 20% 2661 downrated 3
wiki_linguistics 28.46 1183 20% 4376 downrated 2
wiki_physical_science 45.96 913 20% 3023 downrated 3
wiki_history 76.21 621 20% 1690 downrated 3
early_modern_science 84.54 760 20% 1346 downrated 4
religious_translated 114.88 431 20% 937 downrated 4
cooking 329.09 114 20% 437 downrated 4
legal_scotus 63.43 700 20% 1939 downrated 4
eu_parliament_debates 44.38 929 20% 2376 downrated 4
openstax_science 71.44 687 20% 1901 downrated 4
openstax_society 77.68 718 20% 1778 downrated 4
wpa_life_histories 117.22 402 20% 909 downrated 4

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.