| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] period [prep] time | 283 |
|
| 2 | [prep] a [adj] period [prep] time | 268 |
|
| 3 | [prep] a fixed period [prep] [noun sg] | 21 |
|
| 4 | [prep] a fixed period [prep] [noun] | 21 |
|
| 5 | [prep] a fixed [noun sg] [prep] time | 19 |
|
| 6 | [prep] a fixed [noun] [prep] time | 19 |
|
| 7 | [prep] [art] fixed period [prep] time | 17 |
|
| 8 | [prep] [art] fixed period [prep] time | 17 |
|
| 9 | [prep] a fixed period [prep] time | 16 |
|
| 10 | [prep] a fixed period [prep] time | 16 |
|
| 11 | [prep] a fixed period [prep] time | 16 |
|
| 12 | [prep] a fixed period [prep] time | 16 |
|
| 13 | [prep] a fixed period [prep] time | 16 |
|
