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 |
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 |
127.10 | 747 | 100% | 747 | 1 |
20th_books |
108.73 | 903 | 100% | 903 | 1 |
wiki_math |
58.73 | 1804 | 100% | 1804 | 1 |
wiki_geography |
102.09 | 1361 | 100% | 1361 | 1 |
wiki_biology |
57.30 | 2382 | 100% | 2382 | 1 |
wiki_modern_life |
141.30 | 994 | 100% | 994 | 1 |
wiki_arts |
132.55 | 1012 | 100% | 1012 | 1 |
wiki_society |
223.50 | 551 | 100% | 551 | 1 |
wiki_linguistics |
300.57 | 430 | 100% | 430 | 1 |
wiki_physical_science |
121.18 | 1209 | 100% | 1209 | 1 |
wiki_history |
189.16 | 679 | 100% | 679 | 1 |
early_modern_science |
110.44 | 1057 | 100% | 1057 | 1 |
religious_translated |
132.08 | 806 | 100% | 806 | 1 |
cooking |
0.00 | — | — | — | 0 |
legal_scotus |
242.18 | 523 | 100% | 523 | 1 |
eu_parliament_debates |
836.79 | 138 | 100% | 138 | 1 |
openstax_science |
129.17 | 1094 | 100% | 1094 | 1 |
openstax_society |
251.52 | 540 | 100% | 540 | 1 |
wpa_life_histories |
63.60 | 1498 | 100% | 1498 | 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.