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: 4489 (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 11.20 512 5% 8769 downrated 2
20th_books 9.86 587 5% 10247 downrated 2
wiki_math 27.55 348 5% 5145 downrated 2
wiki_geography 30.32 201 5% 3614 downrated 2
wiki_biology 3.01 2168 5% 9000 capped 1
wiki_modern_life 56.05 73 5% 1508 downrated 2
wiki_arts 13.32 548 5% 9497 downrated 2
wiki_society 39.83 143 5% 2514 downrated 2
wiki_linguistics 3.58 1703 5% 9000 capped 1
wiki_physical_science 20.20 303 5% 6363 downrated 1
wiki_history 41.93 131 5% 2372 downrated 2
early_modern_science 29.36 212 5% 3557 downrated 2
religious_translated 39.86 183 5% 3099 downrated 2
cooking 1.29 2585 5% 5200 capped 1
legal_scotus 39.72 147 5% 2630 downrated 2
eu_parliament_debates 20.34 453 5% 6035 downrated 2
openstax_science 13.97 438 5% 9198 downrated 1
openstax_society 59.51 93 5% 1757 downrated 2
wpa_life_histories 3.44 1493 5% 20000 capped 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.