| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over a [adj] [noun] period [prep] | 23 |
|
| 2 | [prep] a four [noun] period [prep] | 6 |
|
| 3 | [prep] a four [noun] period [prep] | 6 |
|
| 4 | over [art] four [noun] period [prep] | 5 |
|
| 5 | over a four [noun] [noun sg] [prep] | 5 |
|
| 6 | over a four [noun] period [prep] | 5 |
|
| 7 | over a four [noun] period [prep] | 5 |
|
| 8 | over a four [noun] [noun] [prep] | 5 |
|
| 9 | over a four [noun] period [prep] | 5 |
|
| 10 | over [art] four [noun] period [prep] | 5 |
|
