[quar.ter.ly] adv (14c) 1: in heraldic quarters or quarterings
2: at 3-month intervals
[2]quarterly adj (15c) 1: computed for or payable at 3-month intervals "~ premium"
2: recurring, issued, or spaced at 3-month intervals
3: divided into heraldic quarters or compartments [3]quarterly n, pl -lies (1830): a periodical published four times a year