Base Difficulty

Base difficulty: Level 135 edit

Level distribution for noun (natural_object): 135: 2 160: 1 170: 2 195: 1 219: 1 290: 1 1399: 1

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: 3707 (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 Movers (2 of 3) 750
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 19.38 1499 20% 4648 downrated 2
20th_books 21.50 1322 20% 4259 downrated 2
wiki_math 0.00 — — — 0
wiki_geography 58.34 721 20% 2274 downrated 2
wiki_biology 35.58 1401 20% 3928 downrated 2
wiki_modern_life 26.11 1460 20% 5519 downrated 2
wiki_arts 98.19 205 20% 1025 downrated 1
wiki_society 5.34 4792 20% 11000 capped 1
wiki_linguistics 6.13 3424 20% 9000 capped 1
wiki_physical_science 149.90 299 20% 869 downrated 2
wiki_history 15.50 1754 20% 8770 downrated 1
early_modern_science 73.51 507 20% 1491 downrated 2
religious_translated 18.85 1522 20% 5174 downrated 2
cooking 0.00 — — — 0
legal_scotus 1.90 7107 20% 20000 capped 1
eu_parliament_debates 0.00 — — — 0
openstax_science 29.92 1527 20% 4533 downrated 2
openstax_society 5.46 4198 20% 11000 capped 1
wpa_life_histories 20.62 1448 20% 4547 downrated 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.