| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adj] period [prep] [noun sg] | 612 |
|
| 2 | a [adj] period [prep] [noun sg] | 570 |
|
| 3 | a [adj] period of [noun sg] | 561 |
|
| 4 | a [adj] period of [noun sg] | 561 |
|
| 5 | a [adj] period [prep] time | 337 |
|
| 6 | a long period [prep] [noun sg] | 172 |
|
| 7 | a long period [prep] [noun sg] | 154 |
|
| 8 | a short period [prep] [noun sg] | 83 |
|
| 9 | a short period [prep] [noun sg] | 76 |
|
| 10 | a [adj -er] period [prep] [noun sg] | 38 |
|
| 11 | a brief period [prep] [noun sg] | 25 |
|
| 12 | a brief period [prep] [noun sg] | 25 |
|
| 13 | a fixed period [prep] [noun sg] | 23 |
|
| 14 | a fixed period [prep] [noun sg] | 23 |
|
| 15 | a certain period [prep] [noun sg] | 22 |
|
| 16 | a considerable period [prep] [noun sg] | 22 |
|
| 17 | a certain period [prep] [noun sg] | 22 |
|
| 18 | a considerable period [prep] [noun sg] | 22 |
|
| 19 | a limited period [prep] [noun sg] | 20 |
|
| 20 | a [adj] period in [noun sg] | 20 |
|
| 21 | a [adj] period in [noun sg] | 20 |
|
| 22 | a limited period [prep] [noun sg] | 20 |
|
| 23 | a prolonged period [prep] [noun sg] | 18 |
|
| 24 | a longer period [prep] [noun sg] | 18 |
|
| 25 | a prolonged period [prep] [noun sg] | 18 |
|
| 26 | a reasonable period [prep] [noun sg] | 15 |
|
| 27 | a reasonable period [prep] [noun sg] | 15 |
|
| 28 | a given period [prep] [noun sg] | 14 |
|
| 29 | a given period [prep] [noun sg] | 14 |
|
| 30 | a lengthy period [prep] [noun sg] | 12 |
|
