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: 755 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cefr A1 (1 of 6) 800

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 9.93 4892 67% 7338 downrated 1
20th_books 20.61 2688 67% 4032 downrated 1
wiki_math 18.43 2955 67% 4432 downrated 1
wiki_geography 338.01 260 67% 335 downrated 2
wiki_biology 145.64 1074 67% 967 2
wiki_modern_life 246.83 643 67% 532 2
wiki_arts 403.66 218 67% 270 downrated 2
wiki_society 509.13 184 67% 199 downrated 2
wiki_linguistics 247.01 468 67% 532 downrated 2
wiki_physical_science 63.30 2694 67% 2121 2
wiki_history 297.27 295 67% 374 downrated 2
early_modern_science 0.00 — — — 0
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 9.04 5753 67% 8630 downrated 1
eu_parliament_debates 108.23 893 67% 1033 downrated 2
openstax_science 91.65 1490 67% 1459 2
openstax_society 675.40 162 67% 167 downrated 2
wpa_life_histories 10.52 4322 67% 6483 downrated 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.