Artificial intelligent assistant

long-running

long-running, a.
  [long adv. 9 a.]
  Continuing for a relatively long period of time; spec. of a play: having a large number of consecutive performances.

1956 Nature 21 Jan 142/1 This is precisely the case in a long-running crossing experiment with strains H..and O. 1968 G. C. Ramsey Agatha Christie iv. 50 It is..poetic justice that the most famous play in the English language should have supplied the title for the longest-running play in England. 1972 Guinness Bk. Records (ed. 19) 98/2 The longest-running musical show ever performed in Britain was The Black and White Minstrel Show. 1975 Listener 6 Feb. 166/2 A long-running and repetitive weekly discussion.

Oxford English Dictionary

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