| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [prep] time to time appoint | 5 |
|
| 2 | may [prep] time to time appoint | 5 |
|
| 3 | may [prep] time to time appoint | 5 |
|
| 4 | [modal v] [prep] time to time appoint | 5 |
|
