Base Difficulty

Base difficulty: Level 135 edit

Level distribution for noun (natural_feature): 10: 2 11: 1 135: 25 165: 1 219: 26 330: 1 1010: 1 1020: 7 1050: 9 1221: 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 Starters (1 of 3) 325

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 383.64 311 100% 270 2
20th_books 197.27 569 100% 506 2
wiki_math 0.00 — — — 0
wiki_geography 1514.27 104 100% 65 2
wiki_biology 640.07 191 100% 168 2
wiki_modern_life 153.38 1272 100% 935 2
wiki_arts 116.79 1755 100% 1114 2
wiki_society 135.06 1469 100% 999 2
wiki_linguistics 60.12 3169 100% 1619 2
wiki_physical_science 377.14 432 100% 358 2
wiki_history 232.63 1037 100% 538 2
early_modern_science 490.43 229 100% 211 2
religious_translated 331.65 351 100% 316 2
cooking 32.88 2308 100% 2308 1
legal_scotus 21.39 5098 100% 3212 2
eu_parliament_debates 92.30 1283 100% 1283 1
openstax_science 73.04 1862 100% 1862 1
openstax_society 84.99 2770 100% 1478 2
wpa_life_histories 129.03 849 100% 739 2

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.