Based on the clue 'a period of time in a hockey game where one team h...', what is the answer?

Based on the clue 'a period of pregnancy or a time for the developmen...', what is the answer? Based on the clue 'a period of regulation play in the national hockey...', what is the answer? Based on the clue 'a period of silence during a radio broadcast', what is the answer? Based on the clue 'a period of the mesozoic era was named for this mo...', what is the answer? Based on the clue 'a permanent legislative group in congress that mee...', what is the answer? Based on the clue 'a perpetual one was tended to by the vestal virgin...', what is the answer? Based on the clue 'a perplexing bequest in wills will left wife anne ...', what is the answer? Based on the clue 'a persian king of this name was killed by one of h...', what is the answer?