| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | used [to-vb] [adv prt] at [noun] | 12 |
|
| 2 | used [to-vb] [adv prt] at [noun sg] | 9 |
|
| 3 | used [to-vb] [adv prt] at night | 6 |
|
| 4 | used [to-vb] [adv prt] at night | 5 |
|
