time and again

time and again (not comparable)

1. Often; repeatedly.
   • 1959 November, P. Ransome-Wallis, “The British Railways Clas "9" 2-10-0s: Part Two”, in Trains Illustrated, page 556:

     For successful and efficient operation, mechanical stokers must be fed with suitable coal. This has been proved time and again in all countries where stoker-fired engines are used.

   • 2011 September 13, Sam Lyon, “Borussia Dortmund 1 - 1 Arsenal”, in BBC‎:

     Mario Gotze was inventive, Lewandowski a menace, and Shinji Kagawa a constant source of energy as, time and again, the hosts played through a porous Arsenal midfield.

• time and time again, time after time, again and again, over and over, over and over again; see also Thesaurus:repeatedly