| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [prep] existence for [num] | 13 |
|
| 2 | been [prep] existence for [num] | 13 |
|
| 3 | been in existence for [num] | 13 |
|
| 4 | been [prep] existence for [num] | 13 |
|
| 5 | been in existence for [num] | 13 |
|
