Base Difficulty

Base difficulty: Level 205 edit

Level distribution for noun (machine_part): 185: 4 195: 3 199: 3 200: 1 204: 1 205: 5 330: 1 1078: 2 1399: 13

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: 1560 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cambridge_yle Flyers (3 of 3) 1200
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 60.92 2549 100% 1404 2
20th_books 47.54 3175 100% 1684 2
wiki_math 26.56 3074 100% 3074 1
wiki_geography 0.00 — — — 0
wiki_biology 0.00 — — — 0
wiki_modern_life 394.17 487 100% 322 2
wiki_arts 0.00 — — — 0
wiki_society 0.00 — — — 0
wiki_linguistics 0.00 — — — 0
wiki_physical_science 0.00 — — — 0
wiki_history 0.00 — — — 0
early_modern_science 51.26 3776 100% 1901 2
religious_translated 50.91 2876 100% 1690 2
cooking 0.00 — — — 0
legal_scotus 0.00 — — — 0
eu_parliament_debates 0.00 — — — 0
openstax_science 27.01 4120 100% 4120 1
openstax_society 0.00 — — — 0
wpa_life_histories 88.51 1725 100% 1042 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.