Base Difficulty

Base difficulty: Level 415 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: 1340 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cefr A2 (2 of 6) 2100

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 83.45 1076 44% 1074 4
20th_books 63.47 1321 44% 1381 downrated 4
wiki_math 8.73 3680 44% 8000 capped 1
wiki_geography 98.87 1807 40% 1410 4
wiki_biology 12.03 4348 44% 9000 capped 1
wiki_modern_life 124.57 1165 40% 1169 downrated 4
wiki_arts 116.28 1475 44% 1192 4
wiki_society 167.65 1113 40% 832 4
wiki_linguistics 30.74 2553 40% 3656 downrated 2
wiki_physical_science 0.00 — — — 0
wiki_history 122.42 794 44% 1078 downrated 3
early_modern_science 58.93 1992 40% 1873 3
religious_translated 217.33 558 44% 499 3
cooking 0.00 — — — 0
legal_scotus 117.52 1264 44% 1069 4
eu_parliament_debates 118.38 896 40% 931 downrated 4
openstax_science 46.62 2376 40% 2594 downrated 3
openstax_society 162.00 933 40% 861 4
wpa_life_histories 58.41 1233 44% 1526 downrated 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.