| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a period [prep] [adj] | 1138 |
|
| 2 | a period [prep] [noun] | 967 |
|
| 3 | a period [prep] [noun sg] | 813 |
|
| 4 | a period [prep] [num] | 560 |
|
| 5 | a period [prep] [adj] | 498 |
|
| 6 | a period [prep] time | 284 |
|
| 7 | a period [prep] time | 284 |
|
| 8 | a period [prep] [adv] | 204 |
|
| 9 | a period [prep] [adv] | 153 |
|
| 10 | a period [prep] [noun pl] | 140 |
|
| 11 | a period [prep] [art] | 124 |
|
| 12 | a period [prep] [art] | 124 |
|
| 13 | a period [prep] [pron] | 97 |
|
| 14 | a period [prep] [Wh det] | 82 |
|
| 15 | a period [prep] which | 79 |
|
| 16 | a period [prep] which | 79 |
|
| 17 | a period [prep] year | 78 |
|
| 18 | a period [prep] years | 77 |
|
| 19 | a period [prep] [det] | 72 |
|
| 20 | a period [prep] two | 70 |
|
| 21 | a period [prep] two | 70 |
|
| 22 | a period [prep] a | 70 |
|
| 23 | a period [prep] a | 63 |
|
| 24 | a period [prep] three | 61 |
|
| 25 | a period [prep] three | 61 |
|
| 26 | a period [prep] the | 53 |
|
| 27 | a period [prep] the | 53 |
|
| 28 | a period [prep] five | 46 |
|
| 29 | a period [prep] five | 46 |
|
| 30 | a period [prep] six | 44 |
|
