Base Difficulty

Base difficulty: Level 5 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: 137 (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 Starters (1 of 3) 325
cefr A1 (1 of 6) 800

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 2730.48 70 97% 45 4
20th_books 3097.78 67 97% 41 4
wiki_math 20.73 3542 100% 3542 1
wiki_geography 218.77 788 100% 611 2
wiki_biology 104.89 2444 100% 1298 2
wiki_modern_life 663.83 248 100% 170 3
wiki_arts 615.52 302 97% 179 2
wiki_society 681.38 302 100% 165 3
wiki_linguistics 297.54 619 97% 442 2
wiki_physical_science 45.72 2923 100% 2923 1
wiki_history 768.82 237 100% 135 2
early_modern_science 1327.95 127 97% 77 3
religious_translated 5313.70 45 97% 25 4
cooking 167.35 1190 97% 648 2
legal_scotus 116.64 1912 97% 967 3
eu_parliament_debates 173.66 948 100% 657 2
openstax_science 42.94 4649 97% 2436 2
openstax_society 844.89 171 100% 138 2
wpa_life_histories 3019.53 81 97% 46 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.