| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | often [verb] [prep] [det] | 259 |
|
| 2 | often [vb -s] [prep] [det] | 28 |
|
| 3 | [adv] happens [prep] [det] | 15 |
|
| 4 | often happens [prep] [adj] | 15 |
|
| 5 | [adv] happens [prep] [det] | 15 |
|
| 6 | often happen [prep] [det] | 8 |
|
| 7 | often happens [prep] [det] | 6 |
|
| 8 | often happens [prep] [det] | 6 |
|
