| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] period [prep] [noun sg] | 1325 |
|
| 2 | a [adj] period [prep] | 1182 |
|
| 3 | a period [prep] [noun sg] | 813 |
|
| 4 | a [adj] [prep] [noun sg] | 506 |
|
| 5 | a [adj] period [noun sg] | 24 |
|
