Follsitim is to stimulate development of follicles ready for egg to ovulate, ovidac
injection used to enhance ovulation - N in a regular 28 d cycle ovulation occurs around 14 days before next period is due
Ovidac injection has maximal efficacy within 12-36 hours of the shot
So presuming N cycle length - you may be able to predict roughly day of ovulation & it is advisable to have relation 3 days before & 4 days after the day of ovulation to have successful conception.
Regarding frequency of intercourse it is better to have it every other day just to avoid getting too stressed re the whole process of conception failure.
Hope this is helpful