| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over a [adj] [noun] [prep] | 211 |
|
| 2 | a [adj] [noun] period [prep] | 103 |
|
| 3 | over a [adj] period [prep] | 19 |
|
| 4 | over a [adj] [noun] period | 13 |
|
