Your doing it to much. Another thing have either of you been tested to make sure everything is alright??? Since it's been a year you can have some test ran to check if all is ok. Have your man get checked as well. Good luck.
5-7 times a day ... it's amazing my husband and find time twice a week. Are you doing only really quick penetrations? Are you sure he is ejaculating?
Anyway, as the ladies above say, if he is really ejaculating five to seven times a day, that will have a reducing effect on his sperm count. Every other day or every third day is better for having a good sperm count.
Since you hv been trying for more than a year, you both need to get check. Having too much sex wont help you get pregnant either. Try every other day and check your fertile period.
You have to give your man's sperm time to reproduce. Having sex several times a day, he's shooting blanks. Every other day is best.
They say every other day is best