from
Bouvier's Law Dictionary, Revised 6th Ed (1856)
ACTIO NON ACCREVIT INFRA SEX ANNOS. The name of a plea to the statute of
limitations when the defendant insists that the plaintiff's action has not
accrued within six years. It differs from non assumpsit in this: non
assumpsit is the proper plea to an action on a simple contract, when the
action accrues on the promise but when it does not accrue on the promise but
subsequently to it, the proper plea is actio non accrevit, &c. Lawes, Pl. in
Ass. 733; 5 Binn. 200, 203; 2 Salk. 422; 1 Saund. Rep. 83 n. 2; 2 Saund, 63,
b; 1 Sell. N.P. 121.