What is considered a healthy amount of sex to be having with your partner?

I’m 29 and the frequency of my sex life has definitely changed, I used to be way more active in my early 20s and now I can see a difference in my sex drive. My partner and I had sex way more often when we first started dating and now the frequency has definitely changed, and I know being in a long term relationship things obviously change especially with work and life but how do you guys navigate making sure the sex drive is still there.