| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] often [vb -s] [prep] [noun sg] | 12 |
|
| 2 | so often [vb -s] [prep] [noun] | 8 |
|
| 3 | [adv] often [vb -s] in [noun] | 7 |
|
| 4 | [adv] often happens [prep] [noun] | 5 |
|
