Base Difficulty

Base difficulty: Level 1399 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: 1374 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
cefr B1 (3 of 6) 4200

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 20.04 3930 100% 3930 1
20th_books 25.03 3239 100% 3239 1
wiki_math 165.84 1074 100% 735 2
wiki_geography 49.17 2786 100% 2786 1
wiki_biology 153.64 1138 100% 892 2
wiki_modern_life 193.89 874 100% 709 3
wiki_arts 64.48 2161 100% 2161 1
wiki_society 117.46 1174 100% 1174 1
wiki_linguistics 29.90 3474 100% 3474 1
wiki_physical_science 177.40 1005 100% 796 2
wiki_history 81.31 1668 100% 1668 1
early_modern_science 40.23 2699 100% 2699 1
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 235.24 545 100% 540 2
eu_parliament_debates 123.79 984 100% 954 2
openstax_science 327.84 552 100% 419 3
openstax_society 243.67 700 100% 566 3
wpa_life_histories 29.05 2716 100% 2716 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.