Base Difficulty

Base difficulty: Level 470 edit

Level distribution for verb (creation_action): 7: 1 10: 1 205: 1 260: 1 295: 1 330: 3 380: 1 400: 1 415: 1 455: 1 470: 12 475: 7 485: 1 1000: 1 1010: 1 1040: 1 1070: 1 1110: 2 1120: 1 1399: 31

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: 397 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cambridge_yle Flyers (3 of 3) 1200
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 45.62 2860 100% 1627 3
20th_books 16.20 5954 100% 3642 2
wiki_math 394.97 520 100% 303 4
wiki_geography 263.43 964 100% 519 2
wiki_biology 66.03 3724 100% 1882 2
wiki_modern_life 1629.72 125 100% 59 4
wiki_arts 1133.17 135 100% 92 3
wiki_society 245.11 1198 100% 566 3
wiki_linguistics 118.77 1626 100% 1032 2
wiki_physical_science 166.67 1530 100% 874 2
wiki_history 292.04 1025 100% 452 3
early_modern_science 36.45 4738 100% 2439 2
religious_translated 37.75 3911 100% 2108 2
cooking 32.68 2288 100% 2288 1
legal_scotus 227.08 782 100% 565 2
eu_parliament_debates 109.32 1424 100% 965 2
openstax_science 294.24 907 100% 470 3
openstax_society 202.14 1154 100% 695 2
wpa_life_histories 35.63 4064 100% 1935 3

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.