S: (n) rain, pelting (anything happening rapidly or in quick successive) "a rain of bullets"; "a pelting of insults"
S: (n) rotation (a planned recurrent sequence (of crops or personnel etc.)) "crop rotation makes a balanced demand on the fertility of the soil"; "the manager had only four starting pitchers in his rotation"
S: (n) row (a continuous chronological succession without an interruption) "they won the championship three years in a row"
S: (n) run (an unbroken chronological sequence) "the play had a long run on Broadway"; "the team enjoyed a brief run of victories"