| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been used in [adj] [noun pl] | 31 |
|
| 2 | been used in [det] [noun pl] | 12 |
|
| 3 | been used in [adj] years | 5 |
|
| 4 | been used in some [noun pl] | 5 |
|
| 5 | been used in some [noun pl] | 5 |
|
| 6 | been used in [adj] studies | 5 |
|
