| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] is customary for [noun pl] [verb] | 5 |
|
| 2 | it is customary for [noun pl] [verb] | 5 |
|
| 3 | [pron] is customary for [noun pl] [to-vb] | 5 |
|
| 4 | [pron] is customary for [noun pl] [verb] | 5 |
|
| 5 | it is customary for [noun pl] [verb] | 5 |
|
