| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [noun pl] [prep] a [adj] | 1900 |
|
| 2 | [noun sg] [prep] a [adj] period | 476 |
|
| 3 | [noun pl] [prep] a [adj] period | 183 |
|
| 4 | [noun sg] [noun pl] [prep] a period | 28 |
|
