Base Difficulty

Base difficulty: Level 276 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: 1056 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
cefr B1 (3 of 6) 4200

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 40.48 2846 100% 1956 2
20th_books 18.93 5318 100% 3326 2
wiki_math 458.36 379 100% 299 2
wiki_geography 91.67 1546 100% 1546 1
wiki_biology 112.10 1252 100% 1252 1
wiki_modern_life 132.32 1087 100% 1087 1
wiki_arts 345.62 632 100% 374 2
wiki_society 102.52 2278 100% 1356 2
wiki_linguistics 59.26 3102 100% 1755 2
wiki_physical_science 399.78 363 100% 329 2
wiki_history 191.37 1186 100% 699 2
early_modern_science 168.12 919 100% 675 2
religious_translated 20.69 3952 100% 3952 1
cooking 0.00 — — — 0
legal_scotus 13.35 5832 100% 5832 1
eu_parliament_debates 25.27 3245 100% 3245 1
openstax_science 479.30 267 100% 243 2
openstax_society 27.26 4206 100% 4206 1
wpa_life_histories 16.93 4134 100% 4134 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.