How often to BD?

My husband has the holy trinity: low sperm count, motility and morphology.

Before we received his results we BD everyday for the middle 15-20 days of my cycle.

I've read both opinions: some say it's a myth that daily/frequent sex diminishes sperm count. Then I've read to go every other day.

Has anyone been given advice by their doctor on how frequent you can have sex without making the problem worse (aka by the time I'm ovulating, his sperm count is too low from all of the previous days of sex) or does it get created everyday and there are no "reserves" that are depleted?

Any thoughts would be awesome!