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: 396 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
cambridge_yle Flyers (3 of 3) 1200
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 51.55 2988 100% 1606 2
20th_books 88.54 1846 100% 985 2
wiki_math 246.45 851 100% 527 2
wiki_geography 648.17 360 100% 183 2
wiki_biology 605.24 226 100% 187 2
wiki_modern_life 269.78 747 100% 513 2
wiki_arts 336.46 486 100% 368 2
wiki_society 914.92 151 100% 110 2
wiki_linguistics 237.04 886 100% 550 2
wiki_physical_science 169.41 1468 100% 857 2
wiki_history 711.26 229 100% 148 2
early_modern_science 131.31 1286 100% 870 2
religious_translated 83.34 1739 100% 1139 2
cooking 0.00 — — — 0
legal_scotus 417.19 422 100% 297 3
eu_parliament_debates 331.70 522 100% 367 2
openstax_science 176.10 1184 100% 780 2
openstax_society 886.71 146 100% 125 2
wpa_life_histories 246.85 802 100% 408 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.