| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [prep] a [adj] | 82510 |
|
| 2 | [prep] a [adj] period | 1646 |
|
| 3 | [noun sg] [prep] a period | 557 |
|
| 4 | [noun sg] [prep] [adj] period | 21 |
|
| 5 | [noun sg] a [adj] period | 7 |
|
