| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] a [adj -er] [conj] | 147 |
|
| 2 | [noun] [prep] a [adj -er] period | 61 |
|
| 3 | [prep] a [adj -er] period [conj] | 25 |
|
| 4 | [noun] [prep] a period [conj] | 21 |
|
