Base Difficulty

Base difficulty: Level 1399 edit

Level distribution for noun (quantitative_concept): 20: 1 26: 1 162: 20 276: 22 380: 20 390: 1 456: 1 460: 1 1000: 1 1050: 2 1070: 2 1080: 5 1090: 1 1110: 1 1120: 1 1202: 2 1203: 1 1204: 2 1206: 1 1210: 2 1211: 1 1213: 7 1218: 1 1225: 2 1226: 1 1399: 21

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: 3247 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
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 7.74 1684 14% 11788 downrated 1
20th_books 0.72 9971 14% 20000 capped 1
wiki_math 3.45 3237 14% 8000 capped 1
wiki_geography 42.38 413 14% 2891 downrated 1
wiki_biology 72.24 207 14% 1449 downrated 1
wiki_modern_life 88.56 151 14% 1057 downrated 1
wiki_arts 101.55 170 14% 1029 downrated 2
wiki_society 43.58 372 14% 2604 downrated 1
wiki_linguistics 16.70 1111 14% 7777 downrated 1
wiki_physical_science 77.17 208 14% 1456 downrated 1
wiki_history 33.93 493 14% 3451 downrated 1
early_modern_science 26.13 1096 14% 4468 downrated 2
religious_translated 3.07 3848 14% 10400 capped 1
cooking 4.35 2398 14% 5200 capped 1
legal_scotus 9.60 1994 14% 11505 downrated 2
eu_parliament_debates 36.40 483 14% 3381 downrated 1
openstax_science 48.71 369 14% 2583 downrated 1
openstax_society 70.56 235 14% 1645 downrated 1
wpa_life_histories 2.71 3763 14% 20000 capped 1

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.