Base Difficulty

Base difficulty: Level 9 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: 76 (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 Movers (2 of 3) 750
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 1608.73 75 100% 75 1
20th_books 1316.72 93 100% 93 1
wiki_math 1548.70 72 100% 72 1
wiki_geography 1560.06 51 100% 51 1
wiki_biology 2242.41 46 100% 46 1
wiki_modern_life 2195.64 42 100% 42 1
wiki_arts 1444.38 62 100% 62 1
wiki_society 1489.43 55 100% 55 1
wiki_linguistics 1615.49 69 100% 69 1
wiki_physical_science 2619.28 33 100% 33 1
wiki_history 1167.35 75 100% 75 1
early_modern_science 2472.89 52 100% 52 1
religious_translated 1206.68 107 100% 107 1
cooking 958.93 168 100% 168 1
legal_scotus 1719.06 61 100% 61 1
eu_parliament_debates 1082.92 104 100% 104 1
openstax_science 2088.39 45 100% 45 1
openstax_society 2220.60 44 100% 44 1
wpa_life_histories 1207.10 117 100% 117 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.