| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] period of | 544 |
|
| 2 | [prep] a [adj] period of | 514 |
|
| 3 | for a [adj] period of | 177 |
|
| 4 | for a [adj] period of | 177 |
|
| 5 | [prep] a long period of | 152 |
|
| 6 | [prep] a long period of | 140 |
|
| 7 | over a [adj] period of | 137 |
|
| 8 | over a [adj] period of | 137 |
|
| 9 | after a [adj] period of | 64 |
|
| 10 | after a [adj] period of | 64 |
|
| 11 | [prep] a short period of | 61 |
|
| 12 | [prep] a short period of | 55 |
|
| 13 | [prep] a [adj -er] period of | 29 |
|
| 14 | of a [adj] period of | 27 |
|
| 15 | of a [adj] period of | 27 |
|
| 16 | in a [adj] period of | 26 |
|
| 17 | in a [adj] period of | 26 |
|
| 18 | [prep] a fixed period of | 25 |
|
| 19 | [prep] a fixed period of | 25 |
|
| 20 | within a [adj] period of | 24 |
|
| 21 | within a [adj] period of | 24 |
|
| 22 | [prep] a continuous period of | 19 |
|
| 23 | [prep] a continuous period of | 19 |
|
| 24 | [prep] a certain period of | 18 |
|
| 25 | [prep] a prolonged period of | 18 |
|
| 26 | [prep] a prolonged period of | 18 |
|
| 27 | [prep] a certain period of | 18 |
|
| 28 | [prep] a considerable period of | 17 |
|
| 29 | [prep] a considerable period of | 17 |
|
| 30 | to a [adj] period of | 16 |
|
