Base Difficulty

Base difficulty: Level 1399 edit

Level distribution for noun (concept_idea): 19: 2 26: 1 27: 1 221: 28 270: 30 274: 30 275: 28 280: 25 300: 1 360: 1 380: 2 1000: 1 1030: 1 1060: 5 1070: 6 1110: 4 1120: 4 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: 4114 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals

No lemma-tier assignment found yet.

Corpus Frequency
Corpus Freq (per M) Best form Share Zipf rank Forms
19th_books 17.17 1089 20% 5445 downrated 1
20th_books 8.08 2129 20% 10645 downrated 1
wiki_math 13.13 1673 20% 8000 capped 1
wiki_geography 103.09 208 20% 1040 downrated 1
wiki_biology 22.78 1221 20% 6105 downrated 1
wiki_modern_life 23.39 1252 20% 6260 downrated 1
wiki_arts 31.94 823 20% 4115 downrated 1
wiki_society 47.13 511 20% 2555 downrated 1
wiki_linguistics 38.01 702 20% 3510 downrated 1
wiki_physical_science 15.34 1878 20% 8000 capped 1
wiki_history 76.70 273 20% 1365 downrated 1
early_modern_science 66.94 321 20% 1605 downrated 1
religious_translated 33.88 634 20% 3170 downrated 1
cooking 6.76 2252 20% 5200 capped 1
legal_scotus 28.12 929 20% 4645 downrated 1
eu_parliament_debates 21.55 1112 20% 5560 downrated 1
openstax_science 4.65 4573 20% 11000 capped 1
openstax_society 31.47 902 20% 4510 downrated 1
wpa_life_histories 12.67 1502 20% 7510 downrated 1

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.