1.      in + 月/ 年     

2.      between … and …

3.      from … to …

4.      over the period from … to …

5.      in the year between … and …

6.      in the 3 years spanning from 2001 through 2004

7.      for the first 3 months

8.      for/ during/ over the next / following 6 months

9.      for/ during/ over / in a period of 4 months

10.     for/ during/ over / in a 4- month period

11.     over/ for / during the same period

12.     from then on / from this time/ point onwards / since then

13.     by the year of …

14.     after / before +  年/ 月