Base Difficulty

Base difficulty: Level 455 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: 723 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
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 173.25 556 44% 546 4
20th_books 206.16 698 44% 476 4
wiki_math 141.05 753 44% 830 downrated 3
wiki_geography 64.49 1517 44% 2172 downrated 2
wiki_biology 25.98 2341 44% 5267 downrated 1
wiki_modern_life 58.78 1090 44% 2452 downrated 1
wiki_arts 154.05 621 44% 844 downrated 4
wiki_society 222.30 366 44% 542 downrated 3
wiki_linguistics 48.64 1756 44% 2464 downrated 2
wiki_physical_science 48.08 1356 44% 3051 downrated 1
wiki_history 213.37 461 44% 578 downrated 3
early_modern_science 190.80 567 50% 569 downrated 3
religious_translated 9.64 3818 44% 8590 downrated 1
cooking 0.00 — — — 0
legal_scotus 604.14 118 44% 183 downrated 4
eu_parliament_debates 362.31 406 44% 333 4
openstax_science 146.21 1217 44% 934 3
openstax_society 411.92 263 44% 301 downrated 4
wpa_life_histories 223.43 707 44% 456 4

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.