Base Difficulty

Base difficulty: Level 23 edit

Level distribution for adverb (intensity): 23: 7 105: 6 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: 311 (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 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 1134.82 111 100% 111 1
20th_books 1191.78 110 100% 110 1
wiki_math 125.88 1058 100% 1058 1
wiki_geography 69.02 2029 100% 2029 1
wiki_biology 162.00 835 100% 835 1
wiki_modern_life 220.06 561 100% 561 1
wiki_arts 200.20 635 100% 635 1
wiki_society 155.81 848 100% 848 1
wiki_linguistics 127.91 1023 100% 1023 1
wiki_physical_science 201.56 708 100% 708 1
wiki_history 231.91 503 100% 503 1
early_modern_science 464.36 220 100% 220 1
religious_translated 294.22 372 100% 372 1
cooking 769.63 216 100% 216 1
legal_scotus 259.05 488 100% 488 1
eu_parliament_debates 807.96 145 100% 145 1
openstax_science 265.15 515 100% 515 1
openstax_society 312.50 407 100% 407 1
wpa_life_histories 1483.61 96 100% 96 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.