Base Difficulty

Base difficulty: Level 310 edit

Level distribution for noun (human): 5: 9 19: 1 310: 45 330: 2 340: 1 370: 1 390: 1 400: 2 405: 1 1000: 4 1010: 1 1020: 3 1030: 2 1040: 5 1050: 1 1060: 8 1070: 8 1120: 7 1130: 5 1399: 66

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: 251 (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 195.26 516 100% 516 1
20th_books 190.34 566 100% 535 2
wiki_math 127.83 1245 100% 871 2
wiki_geography 351.84 418 100% 355 2
wiki_biology 1531.73 127 100% 64 2
wiki_modern_life 621.22 214 100% 168 2
wiki_arts 474.91 265 100% 230 2
wiki_society 1312.15 82 100% 68 2
wiki_linguistics 379.59 456 100% 344 2
wiki_physical_science 835.54 201 100% 142 2
wiki_history 417.59 313 100% 269 2
early_modern_science 242.50 450 100% 450 1
religious_translated 169.40 635 100% 635 1
cooking 39.43 2062 100% 2062 1
legal_scotus 57.26 2092 100% 2092 1
eu_parliament_debates 789.65 149 100% 149 1
openstax_science 1143.42 140 100% 88 2
openstax_society 1097.76 125 100% 99 2
wpa_life_histories 66.12 1546 100% 1333 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.