| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] period [vb mod] | 20 |
|
| 2 | [prep] a [adj] period [vb mod] | 20 |
|
| 3 | over a [adj] period [vb mod] | 10 |
|
| 4 | over a [adj] period [vb mod] | 10 |
|
| 5 | [conj] a [adj] period [vb mod] | 5 |
|
| 6 | a [adj] [noun sg] period [vb mod] | 10 |
|
| 7 | a [adj] [noun] period [vb mod] | 10 |
|
| 8 | a [adj] year period [vb mod] | 5 |
|
| 9 | a [adj] year period [vb mod] | 5 |
|
| 10 | a [adj] period [pron] [vb mod] | 10 |
|
| 11 | a [adj] period [vb mod] [vb infin] | 16 |
|
| 12 | a [adj] period [vb mod] [verb] | 16 |
|
| 13 | a [adj] period [vb mod] be | 12 |
|
| 14 | a [adj] period [vb mod] [be] | 12 |
|
| 15 | a [adj] period [vb mod] be | 12 |
|
| 16 | a [adj] period [vb mod] [be] | 12 |
|
