Base Difficulty

Base difficulty: Level 1399 edit

Level distribution for adverb (location): 18: 4 23: 22 250: 13 1070: 1 1120: 5 1205: 1 1221: 1 1399: 2

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: 1278 (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 6.43 7575 80% 9469 downrated 1
20th_books 4.54 9286 80% 11607 downrated 1
wiki_math 155.70 696 80% 870 downrated 1
wiki_geography 127.78 839 80% 1049 downrated 1
wiki_biology 284.50 329 80% 411 downrated 1
wiki_modern_life 245.07 366 80% 458 downrated 1
wiki_arts 202.66 467 80% 584 downrated 1
wiki_society 155.31 656 80% 820 downrated 1
wiki_linguistics 299.40 329 80% 411 downrated 1
wiki_physical_science 198.89 555 80% 694 downrated 1
wiki_history 147.69 698 80% 873 downrated 1
early_modern_science 80.46 1157 80% 1446 downrated 1
religious_translated 11.60 5064 80% 6330 downrated 1
cooking 0.00 — — — 0
legal_scotus 22.50 3615 80% 4519 downrated 1
eu_parliament_debates 32.28 2399 80% 2999 downrated 1
openstax_science 74.76 1477 80% 1846 downrated 1
openstax_society 91.52 1238 80% 1548 downrated 1
wpa_life_histories 9.15 5494 80% 6868 downrated 1

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.