better part of

better part of

1. almost all of; most of

   It will take the better part of a century to develop this technology.

   • 2021 September 16, A. A. Dowd, “Dan Stevens as a dashing robot lover? That computes”, in AV Club‎:

     Alma, we quickly learn, is a hard-nosed pragmatist, even something of an academic crank, and she has no expectation of actually developing any real relationship with this handsome computer staying in her apartment for the better part of a month.

• best part of