period

01. Living in Berlin during the [period] when the Berlin Wall was torn down was an unforgettable experience.

02. Meetings will be held [periodically] for the members of the project to discuss their progress.

03. The police have been making [periodic] checks of cars to check for drunk drivers.

04. Someone once said that the average person who lives to age 70 has 613,000 hours of life. This is too long a [period] not to have fun.

05. This sale is on for a limited [period] only.

06. The United States went through a [period] of economic prosperity in the 1950s.

07. She hasn't had her [period] for a while now and is afraid she might be pregnant.

08. The Great Depression was once of the most difficult [periods] in the history of our country.

09. Former President Harry Truman once said that men make history, and not the other way around. In [periods] where there is no leadership, society stands still. Progress occurs when courageous, skillful leaders seize the opportunity to change things for the better.

10. In Japan, the dog is believed to have been domesticated as early as the Jomon [period], around 10,000 B.C.

11. Victor Hugo's "Les Miserables" contains one of the longest sentences in the French language - 823 words without a [period].

12. The town of Tororo in Uganda had thunder on an average of 251 days each year during the [period] 1967-1976, the highest number on record.

13. In a rocket, thrust is [periodically] increased several times during take off by the ignition of a new stage.

14. Hurricanes [periodically] devastate the economy of Guadeloupe.

15. The economy of Yemen has been harmed by [periodic] declines in oil prices.

16. The United Nations Universal Declaration of Human Rights states that everyone has the right to rest and leisure, including reasonable limitation of working hours, and [periodic] holidays with pay.

17. Elephants eat about 16 hours per day, spread out through several [periods] during the early morning, late afternoon, and during the night.

18. I've read articles in a number of different psychology [periodicals], and they all seem to agree on the subject.

19. An article he wrote on vocabulary development was recently published in an ESL [periodical].