| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | there have [been] [det] attempt | 19 |
|
| 2 | [ex0] have [been] [det] attempts | 19 |
|
| 3 | [ex0] have been [det] attempt | 19 |
|
| 4 | [ex0] have [been] many attempt | 6 |
|
| 5 | [ex0] have [been] several attempt | 6 |
|
| 6 | [ex0] have [been] few attempt | 5 |
|
