Base Difficulty

Base difficulty: Level 11 edit

Level distribution for preposition (preposition_other): 6: 8 10: 7 11: 5 14: 1 18: 4 23: 2 226: 3 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, 1-1299 for level
Frequency and Tier Signals
Combined Frequency Rank: — (run python -m storage.admin --calc-ranks to populate)
Tier Signals
Source Tier Rank used
cambridge_yle Flyers (3 of 3) 1200

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 224.26 457 100% 457 1
20th_books 216.76 481 100% 481 1
wiki_math 194.36 685 100% 685 1
wiki_geography 2253.30 34 100% 34 1
wiki_biology 1547.46 59 100% 59 1
wiki_modern_life 1456.74 58 100% 58 1
wiki_arts 1439.96 65 100% 65 1
wiki_society 1301.93 63 100% 63 1
wiki_linguistics 772.55 154 100% 154 1
wiki_physical_science 1175.31 74 100% 74 1
wiki_history 2163.31 41 100% 41 1
early_modern_science 643.14 156 100% 156 1
religious_translated 147.69 726 100% 726 1
cooking 98.63 1157 100% 1157 1
legal_scotus 422.28 283 100% 283 1
eu_parliament_debates 416.68 290 100% 290 1
openstax_science 0.00 — — — 0
openstax_society 1071.82 95 100% 95 1
wpa_life_histories 508.79 239 100% 239 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.