Base Difficulty

Base difficulty: Level 6 edit

Level distribution for conjunction (conjunction_other): 6: 4 9: 4 10: 1 11: 2 304: 4 1399: 1

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: 4 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cambridge_yle Starters (1 of 3) 325
cefr A1 (1 of 6) 800

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 36725.21 2 100% 2 1
20th_books 35238.40 2 100% 2 1
wiki_math 25557.49 5 100% 5 1
wiki_geography 42621.56 3 100% 3 1
wiki_biology 39787.86 3 100% 3 1
wiki_modern_life 35458.43 3 100% 3 1
wiki_arts 39840.65 3 100% 3 1
wiki_society 38017.98 3 100% 3 1
wiki_linguistics 33957.92 4 100% 4 1
wiki_physical_science 32823.86 3 100% 3 1
wiki_history 39115.13 3 100% 3 1
early_modern_science 33067.77 3 100% 3 1
religious_translated 47488.43 2 100% 2 1
cooking 46108.51 2 100% 2 1
legal_scotus 19128.39 7 100% 7 1
eu_parliament_debates 30111.12 4 100% 4 1
openstax_science 30986.55 3 100% 3 1
openstax_society 35967.09 3 100% 3 1
wpa_life_histories 34468.85 2 100% 2 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.