Base Difficulty

Base difficulty: Level 8 edit

Level distribution for noun (time_period): 8: 5 28: 5 45: 29

Per-Language Difficulty Overrides

No difficulty overrides set. The base difficulty level will be used for all languages.

Add Difficulty Override
-1 to exclude, 1-100 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 965.48 138 100% 132 2
20th_books 1123.59 121 100% 117 2
wiki_math 45.29 2110 100% 2110 1
wiki_geography 289.16 460 100% 401 2
wiki_biology 462.59 282 100% 245 2
wiki_modern_life 341.81 349 100% 323 2
wiki_arts 695.70 156 100% 146 2
wiki_society 850.91 115 100% 109 2
wiki_linguistics 151.65 881 100% 796 2
wiki_physical_science 739.35 142 100% 135 2
wiki_history 1019.17 94 100% 91 2
early_modern_science 629.50 172 100% 164 2
religious_translated 1531.09 88 100% 81 2
cooking 74.78 1378 100% 1378 1
legal_scotus 372.35 337 100% 320 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.