The frame includes a selected number of horizontal muntins and vertical mullions defining {HEAD ~ a plurality} of {TAIL ~ clear window openings} 
The frame includes a selected number of horizontal muntins and vertical mullions defining { HEAD ~ a plurality } of { TAIL ~ clear window openings }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL