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: 25 (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 4036.87 37 100% 37 1
20th_books 3745.93 38 100% 38 1
wiki_math 4141.41 26 100% 26 1
wiki_geography 7642.89 12 100% 12 1
wiki_biology 8154.21 12 100% 12 1
wiki_modern_life 6574.90 17 100% 17 1
wiki_arts 6587.27 15 100% 15 1
wiki_society 5818.20 17 100% 17 1
wiki_linguistics 6687.66 16 100% 16 1
wiki_physical_science 6818.91 15 100% 15 1
wiki_history 6738.89 16 100% 16 1
early_modern_science 6541.98 19 100% 19 1
religious_translated 6244.99 22 100% 22 1
cooking 3870.67 34 100% 34 1
legal_scotus 3814.15 26 100% 26 1
eu_parliament_debates 3337.25 32 100% 32 1
openstax_science 6273.47 16 100% 16 1
openstax_society 5148.06 19 100% 19 1
wpa_life_histories 3992.37 33 100% 33 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.