| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] [prep] a period of | 32 |
|
| 2 | [coord] [prep] a period of | 32 |
|
| 3 | [coord] over a period of | 18 |
|
| 4 | [coord] over a period of | 18 |
|
| 5 | [coord] [verb] a period of | 16 |
|
| 6 | [coord] for a period of | 7 |
|
| 7 | [coord] for a period of | 7 |
|
| 8 | [coord] after a period of | 6 |
|
| 9 | [coord] after a period of | 6 |
|
| 10 | [coord] [vb base] a period of | 5 |
|
| 11 | [noun] [coord] a period of | 15 |
|
| 12 | [noun sg] [coord] a period of | 11 |
|
| 13 | [adj] [coord] a period of | 9 |
|
| 14 | [num] [coord] a period of | 8 |
|
| 15 | [coord] a [adj] period of | 12 |
|
| 16 | [coord] a [adj] period of | 10 |
|
| 17 | [coord] a period of [adj] | 22 |
|
| 18 | [coord] a period of [num] | 13 |
|
| 19 | [coord] a period of [noun] | 12 |
|
| 20 | [coord] a period of [noun sg] | 11 |
|
| 21 | [coord] a period of [adj] | 9 |
|
