| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [prep] a [adj] | 108979 |
|
| 2 | [prep] a [adj] period | 2001 |
|
| 3 | [noun sg] [prep] [adj] period | 784 |
|
| 4 | [noun sg] [prep] a period | 558 |
|
| 5 | [noun sg] a [adj] period | 10 |
|
