Base Difficulty

Base difficulty: Level 1040 edit

Level distribution for noun (vehicle): 2: 8 26: 3 210: 28 278: 1 1040: 8 1218: 1 1221: 2 1399: 4

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: 4129 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
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 9.93 6768 67% 5989 2
20th_books 3.93 8998 67% 13497 downrated 1
wiki_math 0.00 — — — 0
wiki_geography 0.00 — — — 0
wiki_biology 0.00 — — — 0
wiki_modern_life 77.29 1265 67% 1898 downrated 1
wiki_arts 0.00 — — — 0
wiki_society 0.00 — — — 0
wiki_linguistics 0.00 — — — 0
wiki_physical_science 108.27 1273 67% 1326 downrated 2
wiki_history 0.00 — — — 0
early_modern_science 12.40 4833 67% 7250 downrated 1
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 0.00 — — — 0
eu_parliament_debates 0.00 — — — 0
openstax_science 34.91 3606 67% 3167 2
openstax_society 0.00 — — — 0
wpa_life_histories 5.98 7064 67% 10596 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.