Base Difficulty

Base difficulty: Level 309 edit

Level distribution for noun (group_people): 309: 19 330: 1 405: 2 410: 1 430: 1 1000: 1 1010: 1 1030: 2 1060: 1 1070: 1 1080: 1 1120: 4 1207: 2 1218: 3 1399: 22

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: 372 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
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 20.30 3869 100% 3869 1
20th_books 18.30 4105 100% 4105 1
wiki_math 518.24 308 100% 264 2
wiki_geography 2211.04 37 100% 35 2
wiki_biology 981.28 211 100% 108 2
wiki_modern_life 184.06 1010 100% 771 2
wiki_arts 54.33 2555 100% 2555 1
wiki_society 539.14 245 100% 203 2
wiki_linguistics 461.27 309 100% 268 2
wiki_physical_science 319.57 674 100% 452 2
wiki_history 366.73 368 100% 318 2
early_modern_science 39.85 2716 100% 2716 1
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 116.13 1219 100% 1051 2
eu_parliament_debates 210.02 674 100% 539 2
openstax_science 529.97 323 100% 239 3
openstax_society 631.07 232 100% 190 2
wpa_life_histories 34.77 2414 100% 2414 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.