| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | there [is] usually a | 104 |
|
| 2 | [ex0] [is] usually a | 96 |
|
| 3 | [ex0] is usually a | 72 |
|
| 4 | [ex0] 's usually a | 32 |
|
| 5 | [ex0] [is] usually an | 8 |
|
