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: 571 (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 182.21 569 100% 531 2
20th_books 86.23 1247 100% 1045 2
wiki_math 0.00 — — — 0
wiki_geography 101.43 1375 100% 1375 1
wiki_biology 69.12 3612 100% 1826 2
wiki_modern_life 184.91 1383 100% 803 2
wiki_arts 290.31 498 100% 424 2
wiki_society 862.17 152 100% 118 2
wiki_linguistics 114.78 1386 100% 1052 2
wiki_physical_science 0.00 — — — 0
wiki_history 325.04 445 100% 367 2
early_modern_science 64.52 1775 100% 1775 1
religious_translated 17.60 4436 100% 4436 1
cooking 0.00 — — — 0
legal_scotus 100.76 1390 100% 1208 2
eu_parliament_debates 367.70 380 100% 329 2
openstax_science 34.89 3421 100% 3421 1
openstax_society 1205.97 136 100% 92 3
wpa_life_histories 45.07 2479 100% 1707 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.