Many days and years shall ye be troubled, ye careless women: for the vintage shall fail, the gathering shall not come.
Many days and years shall ye be troubled - namely, during the 70 years' captivity in Babylon (Piscator): as the limiting of the time in Isaiah 32:14-15 shows. The long duration of the calamity is implied. Rather, in little more than a year (Maurer). Literally, days upon a year (so Isaiah 29:1).
The vintage shall fail - through the arrival of the Assyrian invader.
The gathering shall not come. Since the wheat harvest is omitted, Isaiah must look for the invasion in the summer or autumn of 714 BC, when the wheat would have been secured already and the later fruit "gathering" and vintage would be still in danger.