| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [noun] [prep] [noun sg] [art] | 425 |
|
| 2 | a [noun sg] [prep] [noun sg] [art] | 423 |
|
| 3 | [art] period [prep] [noun sg] [art] | 28 |
|
| 4 | a period [prep] [noun] [art] | 17 |
|
| 5 | a period [prep] [noun sg] [art] | 15 |
|
