Base Difficulty

Base difficulty: Level 470 edit

Level distribution for verb (destruction_action): 110: 1 120: 1 160: 1 172: 1 179: 1 265: 1 299: 1 314: 1 470: 4 1078: 1 1399: 7

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: 619 (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 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 361.95 607 49% 259 5
20th_books 398.91 604 49% 248 5
wiki_math 52.68 3281 97% 1403 3
wiki_geography 110.34 2110 97% 1239 3
wiki_biology 159.33 1892 97% 820 4
wiki_modern_life 222.70 1375 97% 656 4
wiki_arts 201.57 2030 97% 673 5
wiki_society 109.76 3945 49% 1218 4
wiki_linguistics 158.82 1936 49% 741 4
wiki_physical_science 219.96 1835 97% 641 4
wiki_history 252.12 1008 97% 532 4
early_modern_science 235.68 831 49% 465 5
religious_translated 239.77 967 49% 406 5
cooking 481.13 459 97% 284 3
legal_scotus 58.32 4079 97% 1345 5
eu_parliament_debates 54.97 2805 97% 1443 3
openstax_science 269.60 1152 97% 504 4
openstax_society 155.84 2129 97% 824 4
wpa_life_histories 402.92 536 97% 248 5

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.