With sunshine and little breeze, conditions proved impressive as Frazer posted a winning score of 43 points.
He completed the front nine on 22 points - with pars registered at the third, fourth, sixth, seventh and eighth holes.
The opening leg also included four single bogeys.
The return journey featured a triple bogey on the 10th but he recovered with birdies across the 12th and 15th, a par to close the round alongside five single bogeys.
Ethan Headley came home as runner-up by two points in a two-over-par 74 to continue the impressive form displayed in individual and inter-club competition.
He produced four birdies - across the first, second, eighth and 11th - plus six bogeys and eight pars.
Thomas Marley was third on 39 points, with 20 over the first leg courtesy of five pars. The back nine included three pars and four single bogeys.
Fintan McAreavey collected the gross prize with a one-under-gross 71. He sat on one-over-par by the front nine following a birdie, two bogeys and six pars - before a back leg that included three birdies and five pars.
Patrick Jordan secured fourth spot on 38 points off his two handicap. A tally across each nine of 19 points - with three birdies and 12 pars the highlights - securing a position above Eugene McKeever.
He put 38 points on the board for fifth, with three birdies, five single bogeys and 10 pars.
James Scullion was the winner of the seniors, with Dara Morgan and Caolan Reynolds the leading two junior players.
Mark Jordan topped the midweek sweep on 39 points.