| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] occur [prep] a time | 6 |
|
| 2 | occur [prep] a [adj] time | 12 |
|
| 3 | occur [prep] a [adj] time | 10 |
|
| 4 | occur [prep] a time [Wh adv] | 13 |
|
| 5 | occur [prep] a time when | 13 |
|
| 6 | occur [prep] a time [adv] | 13 |
|
| 7 | occur [prep] a time when | 13 |
|
