| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] period [prep] [noun] | 1543 |
|
| 2 | a [adj] period [prep] | 1333 |
|
| 3 | a [adj] [prep] [noun] | 1083 |
|
| 4 | a period [prep] [noun] | 968 |
|
| 5 | a [adj] period [noun] | 35 |
|
