| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adj] period [prep] [noun sg] | 612 |
|
| 2 | a fixed [noun] [prep] [noun sg] | 111 |
|
| 3 | a fixed [noun sg] [prep] [noun sg] | 111 |
|
| 4 | [art] fixed period [prep] [noun sg] | 24 |
|
| 5 | [art] fixed period [prep] [noun sg] | 24 |
|
| 6 | a fixed period [prep] [noun sg] | 23 |
|
| 7 | a fixed period [prep] [noun sg] | 23 |
|
| 8 | a fixed period [prep] [noun] | 23 |
|
