| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | this is often [art] | 45 |
|
| 2 | this is often a | 24 |
|
| 3 | this is often the | 21 |
|
| 4 | this is often the | 21 |
|
| 5 | this is often a | 18 |
|
| 6 | this is often an | 6 |
|
