| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [prep] a [adj] period of | 55 |
|
| 2 | [adv] [prep] a [adj] period of | 46 |
|
| 3 | [adv] for a [adj] period of | 23 |
|
| 4 | [adv] [prep] a long period of | 15 |
|
| 5 | [adv] [prep] a long period of | 15 |
|
| 6 | [adv] over a [adj] period of | 12 |
|
| 7 | [adv prt] [prep] a [adj] period of | 10 |
|
| 8 | only [prep] a [adj] period of | 9 |
|
| 9 | only [prep] a [adj] period of | 9 |
|
| 10 | [adv] after a [adj] period of | 8 |
|
| 11 | [adv] [prep] a short period of | 8 |
|
| 12 | [adv] [prep] a short period of | 8 |
|
| 13 | apart [prep] a [adj] period of | 5 |
|
| 14 | [adv] [prep] a continuous period of | 5 |
|
| 15 | [adv] [prep] a continuous period of | 5 |
|
| 16 | apart [prep] a [adj] period of | 5 |
|
