| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] an [adj] period | 86 |
|
| 2 | [noun sg] [prep] an [adj] period | 57 |
|
| 3 | [noun] for an [adj] period | 50 |
|
| 4 | [noun] for an [adj] period | 50 |
|
| 5 | [noun pl] [prep] an [adj] period | 20 |
|
| 6 | [noun] over an [adj] period | 18 |
|
| 7 | [noun] over an [adj] period | 18 |
|
| 8 | [noun] [prep] an indefinite period | 17 |
|
| 9 | [noun] [prep] an extended period | 16 |
|
| 10 | [noun] [prep] an agreed period | 7 |
|
| 11 | [noun prp] [prep] an [adj] period | 6 |
|
| 12 | [noun] [prep] an experimental period | 6 |
|
| 13 | [noun] [prep] an initial period | 6 |
|
| 14 | [noun] during an [adj] period | 5 |
|
| 15 | [noun] [prep] an interim period | 5 |
|
| 16 | [noun] during an [adj] period | 5 |
|
