| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [vb -s] [been] [verb] for | 1037 |
|
| 2 | [noun] [vb -s] [been] [v-ing] for | 146 |
|
| 3 | [noun] [vb -s] [been] operating [prep] | 12 |
|
| 4 | [noun] [verb] [been] operating for | 8 |
|
| 5 | [noun] [vb -s] [been] operate for | 6 |
|
| 6 | [noun] [vb -s] [be] operating for | 6 |
|
