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: 22 (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 2944.61 46 100% 46 1
20th_books 2426.86 57 100% 57 1
wiki_math 6496.48 17 100% 17 1
wiki_geography 2946.80 26 100% 26 1
wiki_biology 7936.23 14 100% 14 1
wiki_modern_life 11040.78 10 100% 10 1
wiki_arts 5828.14 17 100% 17 1
wiki_society 8862.57 12 100% 12 1
wiki_linguistics 9208.88 12 100% 12 1
wiki_physical_science 7438.64 14 100% 14 1
wiki_history 2664.69 32 100% 32 1
early_modern_science 7056.89 16 100% 16 1
religious_translated 3564.11 39 100% 39 1
cooking 9043.93 11 100% 11 1
legal_scotus 7260.63 14 100% 14 1
eu_parliament_debates 2360.67 45 100% 45 1
openstax_science 6524.51 15 100% 15 1
openstax_society 6840.14 11 100% 11 1
wpa_life_histories 3591.74 40 100% 40 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.