Base Difficulty

Base difficulty: Level 19 edit

Level distribution for noun (process_event): 19: 2 20: 1 196: 26 285: 25 289: 27 290: 29 300: 1 330: 2 350: 3 360: 1 370: 1 380: 1 405: 9 450: 1 460: 1 470: 1 476: 1 1000: 2 1010: 6 1020: 6 1030: 6 1040: 12 1050: 18 1060: 5 1070: 12 1080: 1 1110: 2 1120: 10 1130: 7 1202: 1 1204: 1 1210: 1 1211: 1 1216: 1 1399: 118

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: 925 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
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 15.69 4722 100% 4722 1
20th_books 18.30 4119 100% 4119 1
wiki_math 619.02 273 100% 220 2
wiki_geography 0.00 — — — 0
wiki_biology 120.87 2048 100% 1129 2
wiki_modern_life 203.96 999 100% 699 2
wiki_arts 35.02 3832 100% 3832 1
wiki_society 181.98 1115 100% 761 2
wiki_linguistics 66.10 2805 100% 1633 2
wiki_physical_science 186.75 1121 100% 773 2
wiki_history 56.44 2432 100% 2432 1
early_modern_science 83.91 1396 100% 1396 1
religious_translated 15.29 4892 100% 4892 1
cooking 73.24 1401 100% 1401 1
legal_scotus 379.47 367 100% 317 2
eu_parliament_debates 81.17 2053 100% 1196 2
openstax_science 395.23 507 100% 351 2
openstax_society 207.51 1093 100% 679 2
wpa_life_histories 42.13 2432 100% 1952 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.