Elizabeth Nickerson, was the daughter of Eldad Nickerson and Mary Cahoon, who were among the first settlers of Barrington, Nova Scotia. Her date of birth is taken from her father's WikiTree profile, which cites the Nickerson Family Association: The Next Generation (behind a paywall). She may have been born in Chatham, Massachusetts, however there doesn't seem to be a record there. If she was born in Barrington, then she was one of the first. The History of Barrington discusses who was the first male child born, which may mean there was at least one female child born around the same time
On July 7, 1782, she married Benjamin Freeman, son of Samuel Freeman and Mary Mayo and their children included:
↑ "Nova Scotia Marriages, 1711-1909," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:XL5D-Z2N : 5 December 2014), Benjamin Freeman and Elizabeth Nickerson, 07 Jul 1782; citing Liverpool, Queens, Nova Scotia; FHL microfilm 837,883.
↑ 4.04.14.24.18.104.22.168.7Vital Records from The NEHGS Register. Online database. AmericanAncestors.org. New England Historic Genealogical Society, 2014. (Compiled from articles originally published in The New England Historical and Genealogical Register.), Volume 127, page 54 shows the Vital Records of Liverpool NS, which on page 122 recorded the marriage and children of Benjamin and Elizabeth)