| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been empty for [det] [noun] | 10 |
|
| 2 | been empty for [det] [noun pl] | 6 |
|
| 3 | been empty for [det] year | 6 |
|
| 4 | been empty for [det] years | 6 |
|
