| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [is] often [verb] | 150 |
|
| 2 | [conj] [is] [adv] use | 128 |
|
| 3 | [conj] [is] [adv] use | 120 |
|
| 4 | [conj] [be] often use | 26 |
|
| 5 | [conj] [is] often use | 15 |
|
