Base difficulty: Level 22 edit
Level distribution for noun (time_period): 6: 4 22: 25 220: 15 405: 3 1030: 2 1050: 1 1070: 1 1120: 4 1200: 1 1202: 2 1399: 14
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Tier Signals
| Source | Tier | Rank used |
|---|---|---|
basic_english |
Extended (2 of 2) | 1600 |
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 |
332.91 | 319 | 100% | 319 | 1 |
20th_books |
366.16 | 303 | 100% | 303 | 1 |
wiki_math |
0.00 | — | — | — | 0 |
wiki_geography |
0.00 | — | — | — | 0 |
wiki_biology |
0.00 | — | — | — | 0 |
wiki_modern_life |
31.21 | 4366 | 100% | 4366 | 1 |
wiki_arts |
38.95 | 3462 | 100% | 3462 | 1 |
wiki_society |
27.43 | 4674 | 100% | 4674 | 1 |
wiki_linguistics |
0.00 | — | — | — | 0 |
wiki_physical_science |
0.00 | — | — | — | 0 |
wiki_history |
38.13 | 3483 | 100% | 3483 | 1 |
early_modern_science |
0.00 | — | — | — | 0 |
religious_translated |
73.48 | 1402 | 100% | 1402 | 1 |
cooking |
82.24 | 1311 | 100% | 1311 | 1 |
legal_scotus |
6.47 | 8718 | 100% | 8718 | 1 |
eu_parliament_debates |
16.99 | 4130 | 100% | 4130 | 1 |
openstax_science |
0.00 | — | — | — | 0 |
openstax_society |
0.00 | — | — | — | 0 |
wpa_life_histories |
0.00 | — | — | — | 0 |
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.