at long running
Webster's Dictionary (GCIDE)
Running \Run"ning\, n. The act of one who, or of that which runs; as, the running was slow. [1913 Webster]
2.That which runs or flows; the quantity of a liquid which flows in a certain time or during a certain operation; as, the first running of a still. [1913 Webster]
3.The discharge from an ulcer or other sore. [1913 Webster]
At long running, in the long run. [Obs.] --Jer. Taylor. [1913 Webster]