Base Difficulty

Base difficulty: Level 5 edit

Level distribution for noun (family_relation): 5: 11 18: 8 102: 7 302: 10 315: 7 1002: 12 1050: 1 1120: 3 1399: 1

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: 258 (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 274.90 411 100% 364 2
20th_books 281.20 408 100% 357 2
wiki_math 241.85 690 100% 524 2
wiki_geography 326.77 655 100% 401 2
wiki_biology 1784.22 69 100% 54 2
wiki_modern_life 459.61 295 100% 244 2
wiki_arts 420.90 284 100% 259 2
wiki_society 457.02 332 100% 256 2
wiki_linguistics 1015.44 150 100% 120 2
wiki_physical_science 143.42 1409 100% 985 2
wiki_history 949.43 112 100% 99 3
early_modern_science 216.70 785 100% 523 2
religious_translated 248.68 625 100% 425 2
cooking 143.07 852 100% 852 1
legal_scotus 145.27 1068 100% 852 2
eu_parliament_debates 186.13 1070 100% 630 2
openstax_science 117.54 1433 100% 1105 2
openstax_society 1162.60 137 100% 95 3
wpa_life_histories 1034.06 152 100% 122 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.