Base Difficulty

Base difficulty: Level 480 edit

Level distribution for verb (communication): 10: 2 11: 1 29: 1 119: 2 140: 1 185: 1 196: 1 215: 1 230: 1 295: 2 300: 1 310: 3 329: 1 400: 1 415: 4 455: 2 460: 2 475: 4 480: 52 485: 5 1000: 2 1060: 1 1070: 2 1120: 2 1399: 73

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: 4170 (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 17.26 1847 8% 4923 downrated 3
20th_books 11.32 2313 8% 6819 downrated 3
wiki_math 48.71 825 8% 2760 downrated 2
wiki_geography 23.65 877 8% 5691 downrated 2
wiki_biology 16.93 1154 8% 7744 downrated 2
wiki_modern_life 26.02 639 8% 5136 downrated 2
wiki_arts 83.32 379 25% 1360 downrated 2
wiki_society 35.33 627 8% 3789 downrated 2
wiki_linguistics 23.86 595 8% 5107 downrated 2
wiki_physical_science 26.35 719 8% 5263 downrated 2
wiki_history 61.61 633 25% 2046 downrated 2
early_modern_science 30.62 817 8% 3773 downrated 2
religious_translated 25.67 1288 25% 4026 downrated 2
cooking 39.72 781 25% 3124 downrated 1
legal_scotus 61.11 470 8% 1982 downrated 4
eu_parliament_debates 18.40 880 8% 5668 downrated 2
openstax_science 21.65 805 8% 6085 downrated 2
openstax_society 21.21 848 8% 6263 downrated 2
wpa_life_histories 4.32 3587 8% 16302 downrated 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.