According to Boyds marriage index
Trifena Goodwin married John Frost in Elmswell in 1704, and a Trifena Frost married a Robert Mulley in Woolpit in 1708. So quite possibly the same lady.
A John Frost was buried in Elmswell on 28th January, 1706, no age given.
Hopefully info in the parish register would indicate whether she was a widow or not.