quarterly
1. quar.ter.ly \'kwo.(r)t-*r-le-, 'kwo.rt-*l-e-\ av : at 3-month intervals
{interest compounded ~}
2. quarterly aj 1: computed for or payable at 3-month intervals {~ premium}
2: recurring, issued, or spaced at 3-month intervals {~ meeting} 3:
divided into heraldic quarters or compartments
3. quarterly n : a periodical published four times a year
Webster's English Dictionary