Base Difficulty

Base difficulty: Level 162 edit

Level distribution for noun (physical_phenomenon): 135: 3 162: 4 179: 1 219: 1 221: 1 274: 2 275: 2 280: 1 285: 1 290: 2 300: 2 350: 1 380: 1 400: 1 440: 2 1399: 12

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: 1348 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cefr A2 (2 of 6) 2100

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 27.96 845 20% 3301 downrated 2
20th_books 25.32 1015 20% 3731 downrated 2
wiki_math 23.33 1540 20% 4585 downrated 2
wiki_geography 103.57 344 20% 1180 downrated 2
wiki_biology 23.96 1719 20% 5688 downrated 2
wiki_modern_life 102.67 321 20% 1123 downrated 2
wiki_arts 35.28 1409 20% 3928 downrated 2
wiki_society 114.10 376 20% 996 downrated 2
wiki_linguistics 14.08 2392 20% 7782 downrated 2
wiki_physical_science 263.06 99 20% 382 downrated 2
wiki_history 167.24 176 20% 594 downrated 2
early_modern_science 113.37 248 20% 954 downrated 2
religious_translated 36.27 818 20% 2866 downrated 2
cooking 7.21 2169 20% 5200 capped 1
legal_scotus 51.24 548 20% 2412 downrated 2
eu_parliament_debates 76.62 458 20% 1594 downrated 2
openstax_science 265.57 100 20% 368 downrated 2
openstax_society 116.65 382 20% 1102 downrated 2
wpa_life_histories 12.01 1960 20% 7243 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.