| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] [noun] [prep] | 82686 |
|
| 2 | [prep] a [adj] [noun sg] [prep] | 80196 |
|
| 3 | [prep] [art] [adj] period [prep] | 1473 |
|
| 4 | [prep] a [adj] period [prep] | 871 |
|
| 5 | [prep] a [adj] period [prep] | 871 |
|
