Base Difficulty

Base difficulty: Level 299 edit

Level distribution for noun (social_institution): 299: 40 315: 1 360: 1 405: 1 1020: 2 1030: 7 1040: 1 1060: 11 1070: 7 1120: 9 1399: 25

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: 952 (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 53.79 2896 100% 1548 2
20th_books 31.55 3471 100% 2318 2
wiki_math 0.00 — — — 0
wiki_geography 370.24 864 100% 367 3
wiki_biology 0.00 — — — 0
wiki_modern_life 153.27 1328 100% 957 2
wiki_arts 71.68 3583 100% 1866 2
wiki_society 376.84 641 100% 341 3
wiki_linguistics 83.82 2490 100% 1365 2
wiki_physical_science 0.00 — — — 0
wiki_history 195.28 1262 100% 685 2
early_modern_science 57.68 3244 100% 1733 2
religious_translated 239.98 749 100% 444 2
cooking 0.00 — — — 0
legal_scotus 81.33 2286 100% 1256 3
eu_parliament_debates 104.27 1715 100% 997 2
openstax_science 0.00 — — — 0
openstax_society 766.53 346 100% 168 3
wpa_life_histories 21.96 4761 100% 2845 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.