Welcome to HCM.
Intercourse should be timed around the time of ovulation ie. A day before ovulation, on the day of ovulation and one day after ovulation, provided the ovulation has been documented by follicular growth monitoring on ultrasound
Technical problem involved is that we cannot 100 % predict that ovulation will occur in next 24 hours, the period after ovulation we can be certain of.
Ideal would be to abstain from intercourse till 12th day of period and then have intercourse depending on the follicular growth status, if available.
Continuous intercourse depletes the sperms and the count does get reduced with repeated ejaculation.
Wish you all the best.