Frankie Shaw aims to shine a light on a seldom-seen female perspective with ‘SMILF’

Frankie Shaw was 20 when she showed up outside the office of writer-director Katherine Dieckmann armed with a letter and an offering of bagels. And grit. Always some grit.

After taking a semester off her junior year — a period in which she worked as a lobster fisherman in Maine — the Boston native…