| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [prep] a [adj] [noun] | 89672 |
|
| 2 | [noun sg] [prep] [art] [adj] period | 1440 |
|
| 3 | [noun] [prep] a [adj] period | 868 |
|
| 4 | [noun sg] [prep] a [adj] period | 583 |
|
