| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been known for [det] years | 15 |
|
| 2 | have been known for many years | 10 |
|
| 3 | have been known for many years | 10 |
|
| 4 | have been known for [adj] years | 7 |
|
| 5 | has been known for [adj] years | 6 |
|
