| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv prt] [prep] a [adj] period | 47 |
|
| 2 | [adv prt] [prep] a [adj] period | 43 |
|
| 3 | [adv prt] [prep] a [adj] period | 40 |
|
| 4 | [adv prt] for a [adj] period | 16 |
|
| 5 | [adv prt] for a [adj] period | 16 |
|
| 6 | out [prep] a [adj] period | 15 |
|
| 7 | [adv prt] over a [adj] period | 15 |
|
| 8 | [adv prt] over a [adj] period | 15 |
|
| 9 | [adv prt] [prep] a long period | 11 |
|
| 10 | on [prep] a [adj] period | 10 |
|
| 11 | [adv prt] [prep] a long period | 8 |
|
| 12 | [adv prt] [prep] a [adj -er] period | 7 |
|
| 13 | up [prep] a [adj] period | 6 |
|
| 14 | in [prep] a [adj] period | 5 |
|
