| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | in [noun] [prep] a [adj] period | 21 |
|
| 2 | in [noun sg] [prep] a [adj] period | 11 |
|
| 3 | in [noun] for a [adj] period | 8 |
|
| 4 | in [noun] over a [adj] period | 7 |
|
| 5 | in [noun prp] [prep] a [adj] period | 6 |
|
