| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [prep] [noun] for | 127 |
|
| 2 | [verb] been [prep] existence for | 36 |
|
| 3 | have been [prep] existence for | 36 |
|
| 4 | has been [prep] existence [prep] | 24 |
|
| 5 | [vb -s] been [prep] existence for | 17 |
|
| 6 | has [be] [prep] existence for | 17 |
|
| 7 | has [been] [prep] existence for | 17 |
|
| 8 | has be [prep] existence for | 17 |
|
