Base Difficulty

Base difficulty: Level 135 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: 2544 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cambridge_yle Flyers (3 of 3) 1200
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 102.33 1127 100% 842 3
20th_books 99.91 1258 100% 863 3
wiki_math 0.00 — — — 0
wiki_geography 34.35 3931 100% 3931 1
wiki_biology 28.14 4226 100% 4226 1
wiki_modern_life 0.00 — — — 0
wiki_arts 0.00 — — — 0
wiki_society 0.00 — — — 0
wiki_linguistics 62.34 2016 100% 2016 1
wiki_physical_science 0.00 — — — 0
wiki_history 0.00 — — — 0
early_modern_science 87.33 2998 100% 1155 3
religious_translated 27.68 3150 100% 3150 1
cooking 0.00 — — — 0
legal_scotus 0.00 — — — 0
eu_parliament_debates 26.88 4441 100% 2383 2
openstax_science 18.70 5294 100% 5294 1
openstax_society 0.00 — — — 0
wpa_life_histories 34.73 3027 100% 2204 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.