| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] a period [prep] [noun sg] | 12 |
|
| 2 | [coord] a period of [noun sg] | 11 |
|
| 3 | [coord] a period of [noun sg] | 11 |
|
| 4 | and a period [prep] [noun sg] | 11 |
|
