| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [vb infin] the period of | 7 |
|
| 2 | not [vb infin] the period of | 7 |
|
| 3 | not [vb infin] the period of | 7 |
|
| 4 | [not/n't] [vb infin] the period of | 7 |
|
| 5 | [adv] undertake the period of | 5 |
|
