| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for a [adj] period | 691 |
|
| 2 | for a [adj] period | 590 |
|
| 3 | for a short period | 103 |
|
| 4 | for an [adj] period | 101 |
|
| 5 | for a long period | 71 |
|
| 6 | for a limited period | 59 |
|
| 7 | for a brief period | 41 |
|
| 8 | for a fixed period | 35 |
|
| 9 | for a indefinite period | 25 |
|
| 10 | for a specified period | 22 |
|
| 11 | for a transitional period | 20 |
|
| 12 | for a continuous period | 18 |
|
| 13 | for a prolonged period | 18 |
|
| 14 | for a initial period | 17 |
|
| 15 | for a considerable period | 17 |
|
| 16 | for a extended period | 15 |
|
| 17 | for a certain period | 11 |
|
| 18 | for a given period | 10 |
|
| 19 | for a maximum period | 10 |
|
| 20 | for a lengthy period | 9 |
|
| 21 | for a particular period | 8 |
|
| 22 | for a specific period | 8 |
|
| 23 | for a agreed period | 7 |
|
| 24 | for a three-year period | 7 |
|
| 25 | for a reasonable period | 7 |
|
| 26 | for a five-year period | 7 |
|
| 27 | for a six-month period | 6 |
|
| 28 | for a two-year period | 6 |
|
| 29 | for a experimental period | 5 |
|
| 30 | for a interim period | 5 |
|
