| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] cover a period | 7 |
|
| 2 | cover a [adj] period | 13 |
|
| 3 | cover a [adj] period | 13 |
|
| 4 | cover a period [prep] | 15 |
|
| 5 | cover a period [prep] | 15 |
|
| 6 | cover a period of | 11 |
|
| 7 | cover a period of | 11 |
|
