Base Difficulty

Base difficulty: Level 214 edit

Level distribution for verb (existence): 3: 2 10: 1 23: 1 135: 1 170: 1 179: 1 214: 8 215: 1 220: 1 329: 1 415: 1 475: 1 1399: 6

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: 4884 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cefr B1 (3 of 6) 4200

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 23.03 1343 17% 3755 downrated 4
20th_books 14.13 2077 17% 5824 downrated 3
wiki_math 153.98 325 17% 879 downrated 4
wiki_geography 5.97 3801 17% 9000 capped 1
wiki_biology 0.00 — — — 0
wiki_modern_life 10.09 2429 17% 10000 capped 1
wiki_arts 13.44 2729 17% 10000 capped 2
wiki_society 16.36 2689 17% 8536 downrated 2
wiki_linguistics 3.76 4201 17% 9000 capped 1
wiki_physical_science 6.15 3449 17% 8000 capped 1
wiki_history 30.81 952 17% 4341 downrated 2
early_modern_science 53.28 735 17% 2095 downrated 3
religious_translated 24.00 1354 17% 4294 downrated 2
cooking 0.00 — — — 0
legal_scotus 51.95 744 17% 2389 downrated 4
eu_parliament_debates 20.45 2105 17% 4416 downrated 4
openstax_science 3.12 5319 17% 11000 capped 1
openstax_society 22.18 1572 17% 6064 downrated 2
wpa_life_histories 11.58 2190 17% 7543 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.