Base Difficulty

Base difficulty: Level 6 edit

Level distribution for preposition (preposition_other): 6: 10 10: 7 11: 8 14: 1 18: 4 23: 2 226: 5 1080: 1 1120: 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 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 6637.08 24 100% 24 1
20th_books 6455.52 22 100% 22 1
wiki_math 5491.47 20 100% 20 1
wiki_geography 7187.67 13 100% 13 1
wiki_biology 5944.63 18 100% 18 1
wiki_modern_life 7227.56 15 100% 15 1
wiki_arts 7749.85 14 100% 14 1
wiki_society 6603.77 15 100% 15 1
wiki_linguistics 4635.25 25 100% 25 1
wiki_physical_science 5565.12 19 100% 19 1
wiki_history 9052.01 15 100% 15 1
early_modern_science 6120.91 22 100% 22 1
religious_translated 4697.05 33 100% 33 1
cooking 5420.06 22 100% 22 1
legal_scotus 6668.39 15 100% 15 1
eu_parliament_debates 10441.48 13 100% 13 1
openstax_science 5450.58 20 100% 20 1
openstax_society 6576.65 14 100% 14 1
wpa_life_histories 8155.48 14 100% 14 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.