| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] a period [prep] | 43 |
|
| 2 | [coord] a period [prep] | 43 |
|
| 3 | [coord] a period of | 39 |
|
| 4 | and a period [prep] | 34 |
|
| 5 | or a period [prep] | 8 |
|
