| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [verb] been [verb] for | 1295 |
|
| 2 | [noun sg] [verb] been [v-ing] for | 170 |
|
| 3 | [noun sg] [verb] been operating [prep] | 13 |
|
| 4 | [noun] [verb] been operating for | 8 |
|
| 5 | [noun sg] [verb] been operate for | 6 |
|
| 6 | [noun sg] [verb] [been] operating for | 6 |
|
| 7 | [noun sg] [verb] [be] operating for | 6 |
|
| 8 | [noun sg] [verb] be operating for | 6 |
|
