| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adj] period [prep] the | 93 |
|
| 2 | a [adj] period [prep] the | 93 |
|
| 3 | a [adj] period [prep] the | 87 |
|
| 4 | a [adj] period in the | 33 |
|
| 5 | a [adj] period for the | 13 |
|
| 6 | a brief period [prep] the | 11 |
|
| 7 | a brief period [prep] the | 11 |
|
| 8 | a long period [prep] the | 11 |
|
| 9 | a short period [prep] the | 9 |
|
| 10 | a [adj] period of the | 9 |
|
| 11 | a short period [prep] the | 9 |
|
| 12 | a long period [prep] the | 8 |
|
| 13 | a [adj] period during the | 7 |
|
| 14 | a [adj -er] period [prep] the | 6 |
|
| 15 | a [adj] period by the | 5 |
|
| 16 | a [adj] period after the | 5 |
|
| 17 | a [adj] period at the | 5 |
|
