| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [vb pp] [adj] periods | 12 |
|
| 2 | have [vb pp] long periods | 11 |
|
| 3 | have [vb pp] long periods | 10 |
|
| 4 | have [vb pp] [adj] periods | 8 |
|
| 5 | have spent [adj] periods | 7 |
|
