| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a period [prep] [noun sg] | 814 |
|
| 2 | [coord] a period [prep] | 43 |
|
| 3 | [coord] a [prep] [noun sg] | 13 |
|
| 4 | [coord] period [prep] [noun sg] | 6 |
|
