| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [vb -s] [adv] a [adj] period | 10 |
|
| 2 | [noun sg] [vb -s] over a [adj] period | 8 |
|
| 3 | [noun sg] [vb -s] [adv prt] a [adj] period | 8 |
|
| 4 | [noun sg] [vb -s] over a [adj] period | 8 |
|
