Base Difficulty

Base difficulty: Level 1050 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: 4969 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals

No lemma-tier assignment found yet.

Corpus Frequency
Corpus Freq (per M) Best form Share Zipf rank Forms
19th_books 0.00 — — — 0
20th_books 0.00 — — — 0
wiki_math 23.10 2364 57% 4137 downrated 1
wiki_geography 0.00 — — — 0
wiki_biology 15.88 4276 57% 7483 downrated 1
wiki_modern_life 30.55 2744 57% 4802 downrated 1
wiki_arts 0.00 — — — 0
wiki_society 20.21 3871 57% 6774 downrated 1
wiki_linguistics 12.28 4358 57% 7626 downrated 1
wiki_physical_science 130.67 615 57% 1076 downrated 1
wiki_history 0.00 — — — 0
early_modern_science 100.89 621 57% 1087 downrated 1
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 6.13 6653 57% 11643 downrated 1
eu_parliament_debates 15.91 3093 57% 5413 downrated 1
openstax_science 94.99 865 57% 1514 downrated 1
openstax_society 32.12 2390 57% 4182 downrated 1
wpa_life_histories 0.00 — — — 0

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.