1.   At our school we have four periods in the morning and three in the afternoon.

2.   He has periods of depression, which alternate with frenzied activity.

3.   So the idea is that you have to pretend not to have periods, deny their existence.

4.   These have short periods, from a few days to a few weeks.

5.   Society and other academic journals tend to have longer periods between acceptance of their papers and publication than commercial journals.

6.   These intermediate times show very clearly that all modes apart from the cycle had periods of fast or slow movement, whereas the bike continued at a consistent pace.

7.   Pulse rate comparisons showed no significant difference from control group values, both groups had short periods of significant tachycardia.

8.   Men in the rural setting had longer periods of unemployment, but fewer symptoms of depression, suggesting that the broad social context played a role in adaptation.

9.   Then we had a period on the Italian targets.