Base Difficulty

Base difficulty: Level 11 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: 128 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cambridge_yle Flyers (3 of 3) 1200
cefr A2 (2 of 6) 2100

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 221.40 462 100% 462 1
20th_books 213.91 490 100% 490 1
wiki_math 191.71 709 100% 709 1
wiki_geography 2139.52 34 100% 34 1
wiki_biology 1540.64 58 100% 58 1
wiki_modern_life 1443.15 58 100% 58 1
wiki_arts 1399.45 65 100% 65 1
wiki_society 1260.94 63 100% 63 1
wiki_linguistics 734.65 165 100% 165 1
wiki_physical_science 1166.19 74 100% 74 1
wiki_history 2077.37 41 100% 41 1
early_modern_science 637.87 157 100% 157 1
religious_translated 144.98 755 100% 755 1
cooking 98.03 1160 100% 1160 1
legal_scotus 408.01 293 100% 293 1
eu_parliament_debates 414.87 288 100% 288 1
openstax_science 1017.39 88 100% 88 1
openstax_society 1073.92 95 100% 95 1
wpa_life_histories 495.88 245 100% 245 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.