| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] period [subord] may be [vb pp] | 6 |
|
| 2 | such period [subord] may be [vb pp] | 5 |
|
| 3 | [det] period [subord] may be [vb pp] | 5 |
|
| 4 | such period [subord] may be [vb pp] | 5 |
|
| 5 | period [subord] may be [vb pp] [prep] | 5 |
|
| 6 | period [subord] may be [vb pp] [prep] | 5 |
|
