| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a period [prep] [noun] | 968 |
|
| 2 | period [prep] [art] [noun] | 839 |
|
| 3 | a [prep] [art] [noun] | 243 |
|
| 4 | a period [prep] [art] | 124 |
|
| 5 | a period [art] [noun] | 8 |
|
