| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [pron] from time to time | 6 |
|
| 2 | at [pron] [prep] time to time | 6 |
|
| 3 | at [pers pn] [prep] time to time | 6 |
|
| 4 | at [pron] [prep] time to time | 6 |
|
