Base Difficulty

Base difficulty: Level 1399 edit

Level distribution for verb (aspectual): 1399: 3

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: 1607 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
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 81.74 1421 67% 1076 3
20th_books 78.24 1344 67% 1089 4
wiki_math 46.07 2444 67% 1945 2
wiki_geography 58.40 1628 67% 2442 downrated 1
wiki_biology 18.15 4315 67% 6472 downrated 1
wiki_modern_life 56.72 2705 67% 2511 2
wiki_arts 30.11 3022 67% 4533 downrated 1
wiki_society 82.30 2114 67% 1635 3
wiki_linguistics 20.29 3423 67% 5134 downrated 1
wiki_physical_science 0.00 — — — 0
wiki_history 156.79 594 67% 786 downrated 2
early_modern_science 58.44 2455 67% 1870 2
religious_translated 105.58 1147 67% 884 4
cooking 0.00 — — — 0
legal_scotus 351.10 535 67% 365 4
eu_parliament_debates 129.82 1440 67% 789 4
openstax_science 19.11 3928 67% 5892 downrated 1
openstax_society 93.89 1394 67% 1435 downrated 2
wpa_life_histories 60.40 1727 67% 1299 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.