| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [art] past 20 years | 119 |
|
| 2 | in [art] past 20 | 26 |
|
| 3 | in [art] past years | 10 |
|
| 4 | in [art] 20 years | 8 |
|
