| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be a [adj] time | 1072 |
|
| 2 | be a [adj] time | 985 |
|
| 3 | be a difficult [noun] | 331 |
|
| 4 | be a difficult time | 20 |
|
| 5 | [be] a difficult time | 20 |
|
| 6 | be [art] difficult time | 20 |
|
| 7 | be [art] difficult time | 20 |
|
| 8 | be a difficult time | 20 |
|
