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: 326 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
cambridge_yle Flyers (3 of 3) 1200
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 9.76 6681 100% 6681 1
20th_books 29.87 4084 100% 2378 2
wiki_math 239.54 659 100% 529 2
wiki_geography 1522.98 80 100% 64 3
wiki_biology 193.75 687 100% 687 1
wiki_modern_life 241.35 586 100% 523 2
wiki_arts 615.64 186 100% 167 3
wiki_society 1444.04 101 100% 68 4
wiki_linguistics 668.95 209 100% 179 3
wiki_physical_science 214.38 668 100% 668 1
wiki_history 1241.11 80 100% 74 3
early_modern_science 106.26 2205 100% 984 3
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 114.92 2080 100% 903 4
eu_parliament_debates 67.21 2191 100% 1362 2
openstax_science 65.62 2022 100% 2022 1
openstax_society 259.78 798 100% 527 3
wpa_life_histories 56.28 1969 100% 1435 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.