Extended Strong's Greek Lexicon (Abbott-Smith based)
seventy times
Usage: ἑβδομηκοντάκις, adv., [in LXX for שִׁבְעִים, Gen.4:24 * ;] seventy times: ἑ. ἑπτά, seventy times seven, Mat.18:22 (R, txt., ICC, in l.), or seventy-seven times (R, mg.; cf. M, Pr., 98; WM, 314; Meyer, in l.).† (AS)