| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is often a [noun sg] | 132 |
|
| 2 | was often a [noun sg] | 22 |
|
| 3 | are often a [noun sg] | 16 |
|
| 4 | 's often a [noun sg] | 9 |
|
| 5 | be often a problem | 7 |
|
| 6 | be often a matter | 7 |
|
| 7 | be often a sign | 5 |
|
