| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] an [adj] [noun] [prep] | 12989 |
|
| 2 | [prep] an [adj] [noun sg] [prep] | 12773 |
|
| 3 | [prep] [art] [adj] period [prep] | 1473 |
|
| 4 | [prep] [art] [adj] period [prep] | 1473 |
|
| 5 | [prep] a [adj] period [prep] | 871 |
|
| 6 | [prep] an [adj] period [prep] | 98 |
|
| 7 | [prep] an [adj] period [prep] | 98 |
|
| 8 | [prep] an [adj] period [prep] | 98 |
|
