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