| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] a period [prep] time | 97 |
|
| 2 | [noun sg] [prep] a period [prep] time | 66 |
|
| 3 | [verb] [prep] a period [prep] time | 31 |
|
| 4 | [adv] [prep] a period [prep] time | 31 |
|
| 5 | [noun pl] [prep] a period [prep] time | 27 |
|
| 6 | [vb pp] [prep] a period [prep] time | 26 |
|
| 7 | [conj] [prep] a period [prep] time | 18 |
|
| 8 | [adv] [prep] a period [prep] time | 15 |
|
| 9 | [adv prt] [prep] a period [prep] time | 15 |
|
| 10 | [coord] [prep] a period [prep] time | 13 |
|
| 11 | and [prep] a period [prep] time | 9 |
|
| 12 | and [prep] a period [prep] time | 9 |
|
| 13 | [adj] [prep] a period [prep] time | 8 |
|
| 14 | [pron] [prep] a period [prep] time | 7 |
|
| 15 | up [prep] a period [prep] time | 5 |
|
| 16 | [pers pn] [prep] a period [prep] time | 5 |
|
| 17 | up [prep] a period [prep] time | 5 |
|
| 18 | place [prep] a period [prep] time | 5 |
|
| 19 | [prep] such a period [prep] time | 5 |
|
| 20 | [prep] [adj] a period [prep] time | 5 |
|
| 21 | [prep] such a period [prep] time | 5 |
|
| 22 | [prep] [det] a period [prep] time | 5 |
|
| 23 | [prep] a [adj] period [prep] time | 283 |
|
| 24 | [prep] a [adj] period [prep] time | 268 |
|
| 25 | [prep] a long period [prep] time | 98 |
|
| 26 | [prep] a long period [prep] time | 88 |
|
| 27 | [prep] a short period [prep] time | 42 |
|
| 28 | [prep] a short period [prep] time | 38 |
|
| 29 | [prep] a fixed period [prep] time | 16 |
|
| 30 | [prep] a fixed period [prep] time | 16 |
|
