Base Difficulty

Base difficulty: Level 1399 edit

Level distribution for noun (chemical_compound): 314: 13 1010: 1 1040: 1 1050: 32 1070: 1 1078: 2 1100: 103 1120: 1 1399: 17

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: 1094 (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 17.03 3405 40% 4674 downrated 2
20th_books 15.98 3449 40% 4803 downrated 2
wiki_math 715.87 133 40% 179 downrated 2
wiki_geography 26.18 2148 40% 5370 downrated 1
wiki_biology 37.96 2082 40% 3452 downrated 2
wiki_modern_life 136.73 549 40% 951 downrated 2
wiki_arts 210.78 245 40% 519 downrated 2
wiki_society 118.03 586 40% 1093 downrated 2
wiki_linguistics 132.19 585 40% 1004 downrated 2
wiki_physical_science 529.11 135 40% 204 downrated 3
wiki_history 81.13 893 40% 1638 downrated 2
early_modern_science 109.60 549 40% 1009 downrated 2
religious_translated 28.62 1756 40% 3240 downrated 2
cooking 0.00 — — — 0
legal_scotus 139.44 743 40% 936 downrated 2
eu_parliament_debates 76.75 1088 40% 1535 downrated 2
openstax_science 251.53 268 40% 488 downrated 2
openstax_society 70.87 1046 40% 1933 downrated 2
wpa_life_histories 7.87 4744 40% 7720 downrated 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.