Synonyms: semiweekly
Definition: a periodical that is published twice each week (or 104 issues per year)
Similar words: serial, serial publication, series
Definition: a periodical that appears at scheduled times
Synonyms: semiweekly, biweekly
Definition: occurring twice a week
Similar words: periodic, periodical
Definition: happening or recurring at regular intervals
Usage: the periodic appearance of the seventeen-year locust