Base Difficulty

Base difficulty: Level 20 edit

Level distribution for verb (possession): 3: 3 7: 2 10: 1 20: 3 175: 14 254: 1 309: 1 314: 1 360: 1 406: 1 415: 3 455: 1 475: 3 1070: 1 1205: 1 1399: 28

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: 1500 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
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 19.69 2311 44% 4115 downrated 2
20th_books 23.84 1864 44% 3430 downrated 2
wiki_math 32.85 1980 44% 2782 downrated 2
wiki_geography 59.31 1545 44% 2365 downrated 2
wiki_biology 36.72 2538 44% 3533 downrated 2
wiki_modern_life 233.01 282 44% 479 downrated 2
wiki_arts 43.02 2033 44% 3165 downrated 2
wiki_society 114.91 911 44% 1190 downrated 2
wiki_linguistics 9.08 4445 44% 9000 capped 1
wiki_physical_science 52.99 1775 44% 2626 downrated 2
wiki_history 27.50 2209 44% 4970 downrated 1
early_modern_science 15.36 3021 44% 6797 downrated 1
religious_translated 0.00 — — — 0
cooking 39.06 1245 44% 2801 downrated 1
legal_scotus 184.76 454 44% 680 downrated 2
eu_parliament_debates 179.90 564 44% 676 downrated 2
openstax_science 52.64 1690 44% 2501 downrated 2
openstax_society 445.15 193 44% 255 downrated 2
wpa_life_histories 58.36 913 44% 1677 downrated 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.