Base Difficulty

Base difficulty: Level 1399 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: 1192 (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 17.69 2505 20% 3985 downrated 3
20th_books 19.39 2462 20% 3577 downrated 3
wiki_math 61.04 1955 20% 1580 3
wiki_geography 158.26 1096 100% 866 3
wiki_biology 65.75 2612 100% 2029 3
wiki_modern_life 80.38 2398 20% 1817 3
wiki_arts 157.89 1410 100% 865 4
wiki_society 269.11 645 20% 490 4
wiki_linguistics 92.79 1899 100% 1366 3
wiki_physical_science 57.87 2654 100% 2338 2
wiki_history 345.58 504 100% 355 4
early_modern_science 12.30 2576 20% 8242 downrated 2
religious_translated 8.86 2145 20% 10400 capped 1
cooking 0.00 — — — 0
legal_scotus 569.79 84 20% 190 downrated 4
eu_parliament_debates 43.11 2258 20% 1698 4
openstax_science 3.99 5066 20% 11000 capped 1
openstax_society 146.12 1111 20% 915 4
wpa_life_histories 45.85 1549 20% 1786 downrated 3

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.