Decade

Dec"ade (?), n. [F. d├ęcade, L. decas, -adis, fr. Gr. ?, fr. de`ka ten. See Ten.] A group or division of ten; esp., a period of ten years; a decennium; as, a decade of years or days; a decade of soldiers; the second decade of Livy. [Written also decad.]

During this notable decade of years.
Gladstone.