| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [det] a period | 19 |
|
| 2 | [prep] [det] a period | 19 |
|
| 3 | in [det] a period | 5 |
|
| 4 | over [det] a period | 5 |
|
| 5 | of [det] a period | 5 |
|
| 6 | in [det] a period | 5 |
|
| 7 | of [det] a period | 5 |
|
| 8 | over [det] a period | 5 |
|
| 9 | [det] be a period | 25 |
|
| 10 | [det] [be] a period | 25 |
|
| 11 | [det] [was/were] a period | 18 |
|
| 12 | [det] was a period | 18 |
|
| 13 | [det] [prep] a period | 13 |
|
| 14 | [det] [prep] a period | 13 |
|
| 15 | [det] [verb] a period | 7 |
|
| 16 | [det] [is] a period | 7 |
|
| 17 | [det] is a period | 7 |
|
| 18 | [det] [noun] a period | 5 |
|
| 19 | [det] a [adj] period | 33 |
|
| 20 | [det] a [adj] period | 33 |
|
| 21 | [det] a long period | 13 |
|
| 22 | [det] a long period | 13 |
|
| 23 | [det] a short period | 10 |
|
| 24 | [det] a short period | 10 |
|
| 25 | [det] a period of | 12 |
|
| 26 | [det] a period of | 12 |
|
| 27 | [det] a period [prep] | 12 |
|
| 28 | [det] a period [prep] | 12 |
|
