| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] period [prep] | 736 |
|
| 2 | [prep] a [adj] period [prep] | 736 |
|
| 3 | [prep] a [adj] period [prep] | 736 |
|
| 4 | [prep] a [adj] period of | 514 |
|
| 5 | [prep] a [adj] period of | 514 |
|
| 6 | for a [adj] period [prep] | 257 |
|
| 7 | for a [adj] period [prep] | 257 |
|
| 8 | over a [adj] period [prep] | 166 |
|
| 9 | over a [adj] period [prep] | 166 |
|
| 10 | [prep] a long period [prep] | 162 |
|
| 11 | [prep] a short period [prep] | 91 |
|
| 12 | after a [adj] period [prep] | 77 |
|
| 13 | after a [adj] period [prep] | 77 |
|
| 14 | [prep] a [adj] period in | 70 |
|
| 15 | [prep] a [adj] period in | 70 |
|
| 16 | within a [adj] period [prep] | 40 |
|
| 17 | within a [adj] period [prep] | 40 |
|
| 18 | of a [adj] period [prep] | 38 |
|
| 19 | of a [adj] period [prep] | 38 |
|
| 20 | [prep] a brief period [prep] | 36 |
|
| 21 | [prep] a fixed period [prep] | 29 |
|
| 22 | in a [adj] period [prep] | 29 |
|
| 23 | in a [adj] period [prep] | 29 |
|
| 24 | during a [adj] period [prep] | 24 |
|
| 25 | during a [adj] period [prep] | 24 |
|
| 26 | [prep] a certain period [prep] | 22 |
|
| 27 | [prep] a limited period [prep] | 21 |
|
| 28 | [prep] a considerable period [prep] | 20 |
|
| 29 | [prep] a [adj] period after | 20 |
|
| 30 | [prep] a specified period [prep] | 20 |
|
