Base Difficulty

Base difficulty: Level 162 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: 612 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
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 177.07 588 100% 543 2
20th_books 107.26 971 100% 880 2
wiki_math 874.10 182 100% 155 2
wiki_geography 157.77 1060 100% 851 2
wiki_biology 160.44 1639 100% 866 2
wiki_modern_life 358.06 430 100% 343 2
wiki_arts 62.84 2201 100% 2201 1
wiki_society 43.26 3192 100% 3192 1
wiki_linguistics 44.85 2606 100% 2606 1
wiki_physical_science 725.60 200 100% 164 2
wiki_history 59.26 2307 100% 2307 1
early_modern_science 794.30 155 100% 129 2
religious_translated 43.51 2171 100% 2171 1
cooking 0.00 — — — 0
legal_scotus 14.16 5602 100% 5602 1
eu_parliament_debates 20.39 3707 100% 3707 1
openstax_science 631.73 231 100% 182 2
openstax_society 36.34 3338 100% 3338 1
wpa_life_histories 90.14 1089 100% 1089 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.