Base Difficulty

Base difficulty: Level 10 edit

Level distribution for noun (natural_feature): 10: 2 11: 1 135: 25 165: 1 219: 26 254: 1 330: 1 1010: 1 1020: 7 1050: 9 1221: 1 1399: 6

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: — (run python -m storage.admin --calc-ranks to populate)
Tier Signals

No lemma-tier assignment found yet.

Corpus Frequency
Corpus Freq (per M) Best form Share Zipf rank Forms
19th_books 92.95 1361 100% 957 2
20th_books 64.78 1812 100% 1292 2
wiki_math 0.00 — — — 0
wiki_geography 1684.82 104 100% 59 2
wiki_biology 308.71 770 100% 446 2
wiki_modern_life 93.42 2861 100% 1549 2
wiki_arts 154.16 1600 100% 897 2
wiki_society 87.57 2796 100% 1582 2
wiki_linguistics 188.46 1120 100% 685 2
wiki_physical_science 160.16 1514 100% 900 2
wiki_history 0.00 — — — 0
early_modern_science 47.44 2321 100% 2321 1
religious_translated 25.33 3388 100% 3388 1
cooking 0.00 — — — 0
legal_scotus 61.71 1984 100% 1984 1
eu_parliament_debates 38.01 2494 100% 2494 1
openstax_science 21.18 4896 100% 4896 1
openstax_society 104.90 1726 100% 1241 2
wpa_life_histories 39.12 2192 100% 2192 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.