Base Difficulty

Base difficulty: Level 360 edit

Level distribution for adjective (spatial_orientation): 340: 1 360: 2 1010: 6 1020: 5 1040: 1 1050: 3 1060: 1 1080: 1 1110: 1 1120: 12 1205: 1 1213: 1 1399: 11

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: 2673 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
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 26.52 1931 57% 3379 downrated 1
20th_books 26.08 1919 57% 3358 downrated 1
wiki_math 82.49 934 57% 1634 downrated 1
wiki_geography 86.02 888 57% 1554 downrated 1
wiki_biology 172.16 399 57% 698 downrated 1
wiki_modern_life 74.34 1111 57% 1944 downrated 1
wiki_arts 60.22 1309 57% 2291 downrated 1
wiki_society 29.51 2720 57% 4760 downrated 1
wiki_linguistics 45.45 1609 57% 2816 downrated 1
wiki_physical_science 93.95 887 57% 1552 downrated 1
wiki_history 32.79 2387 57% 4177 downrated 1
early_modern_science 86.57 736 57% 1288 downrated 1
religious_translated 18.14 2838 57% 4966 downrated 1
cooking 37.35 1515 57% 2651 downrated 1
legal_scotus 9.71 5047 57% 8832 downrated 1
eu_parliament_debates 0.00 — — — 0
openstax_science 101.64 802 57% 1404 downrated 1
openstax_society 38.03 2076 57% 3633 downrated 1
wpa_life_histories 22.41 2285 57% 3999 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.