| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [noun sg] [prep] a [adj] period | 57 |
|
| 2 | [noun sg] [noun] over a [adj] period | 37 |
|
| 3 | [noun sg] [noun] for a [adj] period | 28 |
|
| 4 | [noun sg] [noun pl] [prep] a [adj] period | 21 |
|
| 5 | [noun sg] [noun] [prep] a long period | 17 |
|
